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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 (
    52499, 52498, 52497, 52496, 52495, 52494, 
    52493, 52492, 52491, 52490, 52489, 
    52488, 52487, 52486, 52485, 52484, 
    52483, 52482, 52481, 52480, 52479, 
    52478, 52477, 111379, 111375, 52473, 
    52472, 52471, 52470, 52469, 52468, 
    52467, 52466, 52626, 52458, 52457, 
    52456, 52455, 52454, 52453, 52451, 
    52450, 52449, 52448, 59351, 52580, 
    52579, 52447, 52446, 52431, 52426, 
    52423, 52416, 52411, 52683, 52399, 
    52398, 52394, 52393, 52392, 52391, 
    52390, 52389, 52388, 52387, 52386, 
    52385, 52384, 52383, 52382, 52381, 
    52380, 52379, 52378, 52377, 52376, 
    52375, 52374, 52373, 52372
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'en'

Query time 0.00037

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