SELECT 
  * 
FROM 
  cscart_ec_table_booking_system_booking_info 
WHERE 
  status = 'A' 
  AND product_id = 381708 
  AND booking_type = 'R'

Query time 0.00076

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "3.73"
    },
    "table": {
      "table_name": "cscart_ec_table_booking_system_booking_info",
      "access_type": "ALL",
      "rows_examined_per_scan": 7,
      "rows_produced_per_join": 0,
      "filtered": "14.29",
      "cost_info": {
        "read_cost": "3.53",
        "eval_cost": "0.20",
        "prefix_cost": "3.73",
        "data_read_per_join": "63"
      },
      "used_columns": [
        "id",
        "order_id",
        "product_id",
        "booking_info",
        "start_date",
        "end_date",
        "slot",
        "quantity",
        "status",
        "booking_type"
      ],
      "attached_condition": "((`webmarco`.`cscart_ec_table_booking_system_booking_info`.`product_id` = 381708) and (`webmarco`.`cscart_ec_table_booking_system_booking_info`.`status` = 'A') and (`webmarco`.`cscart_ec_table_booking_system_booking_info`.`booking_type` = 'R'))"
    }
  }
}