SELECT 
  feature_id 
FROM 
  cscart_product_features 
WHERE 
  feature_id IN (
    874, 906, 903, 868, 918, 919, 825, 827, 
    875, 901
  ) 
  AND feature_type = 'E'

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "24.01"
    },
    "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": 10,
      "rows_produced_per_join": 1,
      "filtered": "10.00",
      "index_condition": "(`danishecarter_latest`.`cscart_product_features`.`feature_id` in (874,906,903,868,918,919,825,827,875,901))",
      "cost_info": {
        "read_cost": "23.81",
        "eval_cost": "0.20",
        "prefix_cost": "24.01",
        "data_read_per_join": "1K"
      },
      "used_columns": [
        "feature_id",
        "feature_type"
      ],
      "attached_condition": "(`danishecarter_latest`.`cscart_product_features`.`feature_type` = 'E')"
    }
  }
}