SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    1130, 1131, 1132, 1133, 1135, 1136, 1137, 
    1138, 1139, 1140, 1141, 1142, 1143, 
    1144, 1146, 1147, 1148, 1149, 1150, 
    1151, 1152, 1153, 1154, 1155, 1156, 
    1157, 1158, 1159, 1160, 1161, 1162, 
    1163, 1164, 1165, 14, 1256
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00135

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 36,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (1130,1131,1132,1133,1135,1136,1137,1138,1139,1140,1141,1142,1143,1144,1146,1147,1148,1149,1150,1151,1152,1153,1154,1155,1156,1157,1158,1159,1160,1161,1162,1163,1164,1165,14,1256) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text unit_name
14
1130
1131
1132
1133
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1256