SELECT 
  * 
FROM 
  cscart_ec_table_booking_system_price 
WHERE 
  product_id = 278

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "2.82"
    },
    "table": {
      "table_name": "cscart_ec_table_booking_system_price",
      "access_type": "ALL",
      "rows_examined_per_scan": 4,
      "rows_produced_per_join": 1,
      "filtered": "25.00",
      "cost_info": {
        "read_cost": "2.62",
        "eval_cost": "0.20",
        "prefix_cost": "2.82",
        "data_read_per_join": "24"
      },
      "used_columns": [
        "id",
        "product_id",
        "from_date",
        "to_date",
        "price"
      ],
      "attached_condition": "(`atulecarter_atul_demo5`.`cscart_ec_table_booking_system_price`.`product_id` = 278)"
    }
  }
}