SELECT 
  prf.*, 
  rf.*, 
  rfd.title 
FROM 
  cscart_ec_hb_product_room_facilities as prf 
  LEFT JOIN cscart_ec_hb_room_facilities as rf ON prf.facility_id = rf.facility_id 
  LEFT JOIN cscart_ec_hb_room_facilities_desc as rfd ON rf.facility_id = rfd.facility_id 
WHERE 
  prf.group_id = 21 
  AND rfd.lang_code = 'en' 
  AND rf.status = 'A' 
ORDER BY 
  rfd.title ASC

Query time 0.00072

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "5.71"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "0.26"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "rf",
            "access_type": "ALL",
            "possible_keys": [
              "PRIMARY"
            ],
            "rows_examined_per_scan": 3,
            "rows_produced_per_join": 1,
            "filtered": "33.33",
            "cost_info": {
              "read_cost": "2.42",
              "eval_cost": "0.20",
              "prefix_cost": "2.62",
              "data_read_per_join": "784"
            },
            "used_columns": [
              "facility_id",
              "status",
              "timestamp",
              "company_id"
            ],
            "attached_condition": "((`pankajecarter_systemfive`.`rf`.`status` = 'A') and (`pankajecarter_systemfive`.`rf`.`facility_id` is not null))"
          }
        },
        {
          "table": {
            "table_name": "prf",
            "access_type": "ref",
            "possible_keys": [
              "facility_id"
            ],
            "key": "facility_id",
            "used_key_parts": [
              "facility_id"
            ],
            "key_length": "3",
            "ref": [
              "pankajecarter_systemfive.rf.facility_id"
            ],
            "rows_examined_per_scan": 2,
            "rows_produced_per_join": 0,
            "filtered": "10.00",
            "cost_info": {
              "read_cost": "2.00",
              "eval_cost": "0.05",
              "prefix_cost": "5.14",
              "data_read_per_join": "4"
            },
            "used_columns": [
              "id",
              "product_id",
              "facility_id",
              "group_id"
            ],
            "attached_condition": "(`pankajecarter_systemfive`.`prf`.`group_id` = 21)"
          }
        },
        {
          "table": {
            "table_name": "rfd",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "facility_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "pankajecarter_systemfive.rf.facility_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 0,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.26",
              "eval_cost": "0.05",
              "prefix_cost": "5.45",
              "data_read_per_join": "203"
            },
            "used_columns": [
              "facility_id",
              "lang_code",
              "title"
            ]
          }
        }
      ]
    }
  }
}