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 (
    1233, 1234, 1232, 1231, 1222, 105, 71, 
    104, 72, 34, 36, 1175, 1911, 1245, 99, 
    1311, 78, 100, 98, 88, 1319, 85, 1280, 
    1279, 283, 1247, 1110, 985, 1300, 1035, 
    1028, 603, 1268, 1269, 1392, 1380, 1391, 
    1388, 968, 1163, 84, 38, 1162, 1299, 
    1350, 1314, 154, 1328, 1329, 1326, 1327, 
    22, 35, 1511, 1298, 1297, 83
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00181

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": 57,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (1233,1234,1232,1231,1222,105,71,104,72,34,36,1175,1911,1245,99,1311,78,100,98,88,1319,85,1280,1279,283,1247,1110,985,1300,1035,1028,603,1268,1269,1392,1380,1391,1388,968,1163,84,38,1162,1299,1350,1314,154,1328,1329,1326,1327,22,35,1511,1298,1297,83) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text unit_name
22
34
35
36
38
71
72
78
83
84
85
88
98
99
100
104
105
154
283
603
968
985
1028
1035
1110
1162
1163
1175
1222
1231
1232
1233
1234
1245
1247
1268
1269
1279
1280
1297
1298
1299
1300
1311
1314
1319
1326
1327
1328
1329
1350
1380
1388
1391
1392
1511
1911