SELECT 
  product_id, 
  feature_short_desc 
FROM 
  cscart_ab__short_desc_from_features_values 
WHERE 
  product_id IN (
    8326, 8328, 8333, 8342, 8343, 8344, 8345, 
    8355, 8356, 8362, 8365, 8366, 8367, 
    8368, 8370, 8371
  ) 
  AND lang_code = 'ru' 
  AND storefront_id = 1

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_ab__short_desc_from_features_values",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 32,
      "filtered": 100,
      "attached_condition": "cscart_ab__short_desc_from_features_values.storefront_id = 1 and cscart_ab__short_desc_from_features_values.product_id in (8326,8328,8333,8342,8343,8344,8345,8355,8356,8362,8365,8366,8367,8368,8370,8371) and cscart_ab__short_desc_from_features_values.lang_code = 'ru'"
    }
  }
}