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SELECT 
  ushop_profile_fields.*, 
  ushop_profile_field_descriptions.description, 
  ushop_profile_fields.profile_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 = 'es' 
WHERE 
  1 = 1 
  AND ushop_profile_fields.profile_type = 'U' 
  AND ushop_profile_fields.profile_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 0.00398

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "18.16"
    },
    "ordering_operation": {
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "ushop_profile_fields",
            "access_type": "ref",
            "possible_keys": [
              "profile_show"
            ],
            "key": "profile_show",
            "used_key_parts": [
              "profile_show"
            ],
            "key_length": "4",
            "ref": [
              "const"
            ],
            "rows_examined_per_scan": 104,
            "rows_produced_per_join": 9,
            "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": "0.95",
              "prefix_cost": "14.85",
              "data_read_per_join": "9K"
            },
            "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": 9,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "2.36",
              "eval_cost": "0.95",
              "prefix_cost": "18.16",
              "data_read_per_join": "21K"
            },
            "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_in_symbols	cp_in_numbers	cp_in_lowercase	cp_in_uppercase
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	Nombre	N	Se usará para identificarte y será público	Martín	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	Apellido	N	Se usará para identificarte y será público	Rodríguez	N	N	N	N
8	company	Y	N	N	N	N	N	Y	I	U	30	Y	C	0	company		organization	2	Empresa	N	Opcional	Nike	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	Dirección	N		12 de abril 2256	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	Teléfono	N	Sin el cero inicial	92873178	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	Ciudad	N		Montevideo	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	País	N			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	Departamento	N			N	N	N	N