SELECT 
  * 
FROM 
  ushop_csc_product_questions 
WHERE 
  1 
  AND ushop_csc_product_questions.company_id = 0

Query time 0.00055

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.55"
    },
    "table": {
      "table_name": "ushop_csc_product_questions",
      "access_type": "ALL",
      "rows_examined_per_scan": 13,
      "rows_produced_per_join": 1,
      "filtered": "10.00",
      "cost_info": {
        "read_cost": "1.42",
        "eval_cost": "0.13",
        "prefix_cost": "1.55",
        "data_read_per_join": "1019"
      },
      "used_columns": [
        "name",
        "company_id",
        "value"
      ],
      "attached_condition": "(`marketplace`.`ushop_csc_product_questions`.`company_id` = 0)"
    }
  }
}