SELECT 
  feature_id 
FROM 
  cscart_product_features 
WHERE 
  feature_id IN (
    1055, 1041, 1046, 1050, 1047, 1061, 1044, 
    1056, 1052, 1054, 1058, 1043, 1053, 
    1045
  ) 
  AND feature_type = 'E'

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "33.61"
    },
    "table": {
      "table_name": "cscart_product_features",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "feature_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 14,
      "rows_produced_per_join": 1,
      "filtered": "10.00",
      "index_condition": "(`danishecarter_25_march`.`cscart_product_features`.`feature_id` in (1055,1041,1046,1050,1047,1061,1044,1056,1052,1054,1058,1043,1053,1045))",
      "cost_info": {
        "read_cost": "33.33",
        "eval_cost": "0.28",
        "prefix_cost": "33.61",
        "data_read_per_join": "1K"
      },
      "used_columns": [
        "feature_id",
        "feature_type"
      ],
      "attached_condition": "(`danishecarter_25_march`.`cscart_product_features`.`feature_type` = 'E')"
    }
  }
}