SELECT 
  product_id, 
  feature_short_desc 
FROM 
  cscart_ab__short_desc_from_features_values 
WHERE 
  product_id IN (
    20586, 20645, 20647, 20646, 20635, 20648, 
    20636, 20649, 20637, 20650, 20638, 
    20639, 20640, 20641, 20643, 21515, 
    20644, 20188, 20331
  ) 
  AND lang_code = 'uk' 
  AND storefront_id = 1 
  AND cscart_ab__short_desc_from_features_values.company_id = 1

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_ab__short_desc_from_features_values",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "17",
          "used_key_parts": [
            "product_id",
            "lang_code",
            "company_id",
            "storefront_id"
          ],
          "rows": 19,
          "filtered": 100,
          "attached_condition": "cscart_ab__short_desc_from_features_values.storefront_id = 1 and cscart_ab__short_desc_from_features_values.company_id = 1 and cscart_ab__short_desc_from_features_values.product_id in (20586,20645,20647,20646,20635,20648,20636,20649,20637,20650,20638,20639,20640,20641,20643,21515,20644,20188,20331) and cscart_ab__short_desc_from_features_values.lang_code = 'uk'"
        }
      }
    ]
  }
}