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SELECT 
  cscart_ult_product_descriptions.product_id, 
  cscart_ult_product_descriptions.short_description, 
  IF(
    cscart_ult_product_descriptions.short_description = "", 
    cscart_ult_product_descriptions.full_description, 
    ""
  ) AS full_description, 
  cscart_ult_product_descriptions.meta_keywords, 
  cscart_ult_product_descriptions.meta_description, 
  cscart_ult_product_descriptions.search_words, 
  cscart_ult_product_descriptions.promo_text 
FROM 
  cscart_ult_product_descriptions 
WHERE 
  cscart_ult_product_descriptions.product_id IN (
    89019, 89018, 89017, 89016, 89015, 89014, 
    88971, 89484, 89444, 89278, 88869, 
    88868, 89442, 89441, 89440, 89439, 
    89438, 89139, 89138, 89137, 89136, 
    89135, 89134, 89133, 89132, 89131, 
    89130, 89129, 89128, 89127, 89126, 
    89125, 89124, 89123, 89122, 88918, 
    88726, 88725, 88724, 88723
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'en'

Query time 0.00029

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	cscart_ult_product_descriptions	ALL	PRIMARY,product_id,company_id				1	Using where