SELECT 
  ushop_profile_fields.*, 
  ushop_profile_field_descriptions.description, 
  ushop_profile_fields.checkout_required as required, 
  ushop_profile_field_descriptions.cp_prompt, 
  ushop_profile_field_descriptions.cp_placeholder, 
  ushop_profile_field_descriptions.cp_maxlength, 
  ushop_profile_field_descriptions.cp_in_symbols, 
  ushop_profile_field_descriptions.cp_in_numbers, 
  ushop_profile_field_descriptions.cp_in_lowercase, 
  ushop_profile_field_descriptions.cp_in_uppercase, 
  ushop_profile_field_descriptions.cp_valid_alphabet 
FROM 
  ushop_profile_fields 
  LEFT JOIN ushop_profile_field_descriptions ON ushop_profile_field_descriptions.object_id = ushop_profile_fields.field_id 
  AND ushop_profile_field_descriptions.object_type = 'F' 
  AND lang_code = 'en' 
WHERE 
  1 = 1 
  AND ushop_profile_fields.profile_type = 'U' 
  AND ushop_profile_fields.checkout_show = 'Y' 
  AND (
    ushop_profile_fields.field_type != 'E' 
    OR ushop_profile_fields.section != 'C' 
    AND ushop_profile_fields.field_type = 'E'
  ) 
ORDER BY 
  ushop_profile_fields.position

Query time 0.00649

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "10.52"
    },
    "ordering_operation": {
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "ushop_profile_fields",
            "access_type": "ref",
            "possible_keys": [
              "checkout_show"
            ],
            "key": "checkout_show",
            "used_key_parts": [
              "checkout_show"
            ],
            "key_length": "4",
            "ref": [
              "const"
            ],
            "rows_examined_per_scan": 46,
            "rows_produced_per_join": 4,
            "filtered": "9.09",
            "index_condition": "((`marketplace`.`ushop_profile_fields`.`field_type` <> 'E') or (`marketplace`.`ushop_profile_fields`.`field_type` = 'E'))",
            "cost_info": {
              "read_cost": "4.45",
              "eval_cost": "0.42",
              "prefix_cost": "9.05",
              "data_read_per_join": "4K"
            },
            "used_columns": [
              "field_id",
              "field_name",
              "profile_show",
              "profile_required",
              "checkout_show",
              "checkout_required",
              "partner_show",
              "partner_required",
              "storefront_show",
              "field_type",
              "profile_type",
              "position",
              "is_default",
              "section",
              "matching_id",
              "class",
              "wrapper_class",
              "autocomplete_type",
              "ec_step"
            ],
            "attached_condition": "((`marketplace`.`ushop_profile_fields`.`profile_type` = 'U') and ((`marketplace`.`ushop_profile_fields`.`field_type` <> 'E') or ((`marketplace`.`ushop_profile_fields`.`section` <> 'C') and (`marketplace`.`ushop_profile_fields`.`field_type` = 'E'))))"
          }
        },
        {
          "table": {
            "table_name": "ushop_profile_field_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "object_id",
              "object_type",
              "lang_code"
            ],
            "key_length": "12",
            "ref": [
              "marketplace.ushop_profile_fields.field_id",
              "const",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 4,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "1.05",
              "eval_cost": "0.42",
              "prefix_cost": "10.52",
              "data_read_per_join": "9K"
            },
            "used_columns": [
              "object_id",
              "description",
              "object_type",
              "lang_code",
              "cp_valid_alphabet",
              "cp_in_symbols",
              "cp_in_numbers",
              "cp_in_lowercase",
              "cp_in_uppercase",
              "cp_maxlength",
              "cp_placeholder",
              "cp_prompt"
            ]
          }
        }
      ]
    }
  }
}

Result

field_id field_name profile_show profile_required checkout_show checkout_required partner_show partner_required storefront_show field_type profile_type position is_default section matching_id class wrapper_class autocomplete_type ec_step description required cp_prompt cp_placeholder cp_maxlength cp_in_symbols cp_in_numbers cp_in_lowercase cp_in_uppercase cp_valid_alphabet
6 firstname Y N Y N N N Y I U 10 Y C 0 litecheckout__field--large first-name litecheckout__field--large given-name 2 First name N 0 N N N N
14 b_firstname N N Y N N N Y I U 10 Y B 15 billing-first-name litecheckout__field--large litecheckout__field--large given-name 4 First name N 0 N N N N
15 s_firstname N N Y Y N N Y I U 10 Y S 14 shipping-first-name litecheckout__field--large litecheckout__field--large given-name 0 First name Y 0 N N N N
7 lastname Y N Y N N N Y I U 20 Y C 0 last-name litecheckout__field--large surname 2 Last name N 0 N N N N
16 b_lastname N N Y N N N Y I U 20 Y B 17 billing-last-name litecheckout__field--large surname 4 Last name N 0 N N N N
17 s_lastname N N Y Y N N Y I U 20 Y S 16 shipping-last-name litecheckout__field--large surname 0 Last name Y 0 N N N N
18 b_address N N Y N N N Y I U 30 Y B 19 billing-address litecheckout__field--large street-address 4 Address N 0 N N N N
19 s_address Y N Y Y N N Y I U 30 Y S 18 shipping-address litecheckout__field--large shipping street-address 0 Address Y 0 N N N N
9 phone Y N Y Y N N Y P U 40 Y C 0 phone litecheckout__field--large tel 3 Phone Y 0 N N N N
22 b_city N N Y N N N Y I U 50 Y B 23 billing-city litecheckout__field--large city 4 City N 0 N N N N
23 s_city Y N Y Y N N Y I U 50 Y S 22 shipping-city litecheckout__field--large city 0 City Y 0 N N N N
26 b_country N N Y N N N Y O U 60 Y B 27 billing-country litecheckout__field--large country 4 Country N 0 N N N N
27 s_country Y N Y Y N N Y O U 60 Y S 26 shipping-country litecheckout__field--large country 0 Country Y 0 N N N N
25 s_state Y N Y Y N N Y A U 70 Y S 24 shipping-state litecheckout__field--large state 0 State/province Y 0 N N N N
24 b_state N N Y N N N Y A U 70 Y B 25 billing-state litecheckout__field--large state 4 State/province N 0 N N N N
28 b_zipcode N N Y N N N Y Z U 80 Y B 29 billing-zip-code litecheckout__field--xsmall postal-code 4 Zip/postal code N 0 N N N N
29 s_zipcode N N Y Y N N Y Z U 80 Y S 28 shipping-zip-code litecheckout__field--xsmall shipping postal-code 0 Zip/postal code Y 0 N N N N
30 b_phone N N Y N N N Y P U 90 Y B 31 billing-phone litecheckout__field--large tel 3 Phone N 0 N N N N