SELECT 
  product_id, 
  feature_short_desc 
FROM 
  cscart_ab__short_desc_from_features_values 
WHERE 
  product_id IN (
    18349, 18350, 18351, 18352, 18353, 18354, 
    18355, 18356, 18357, 18358, 18359, 
    18360, 18361, 18362, 18363, 18364
  ) 
  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 (18349,18350,18351,18352,18353,18354,18355,18356,18357,18358,18359,18360,18361,18362,18363,18364) and cscart_ab__short_desc_from_features_values.lang_code = 'ru'"
    }
  }
}