SELECT 
  feature_id 
FROM 
  tconnect_product_features 
WHERE 
  feature_id IN (
    23, 21, 29, 28, 26, 25, 27, 36, 35, 32, 31, 
    42, 45, 44, 43
  ) 
  AND feature_type = 'E'

Query time 0.00304

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.016761015,
    "nested_loop": [
      {
        "table": {
          "table_name": "tconnect_product_features",
          "access_type": "ALL",
          "possible_keys": ["PRIMARY"],
          "loops": 1,
          "rows": 43,
          "cost": 0.016761015,
          "filtered": 34.8837204,
          "attached_condition": "tconnect_product_features.feature_id in (23,21,29,28,26,25,27,36,35,32,31,42,45,44,43) and tconnect_product_features.feature_type = 'E'"
        }
      }
    ]
  }
}