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SELECT 
  cscart_images.*, 
  cscart_images_links.*, 
  cscart_common_descriptions.description AS alt, 
  cscart_images.image_id AS images_image_id 
FROM 
  cscart_images_links 
  LEFT JOIN cscart_images ON cscart_images_links.image_id = cscart_images.image_id 
  LEFT JOIN cscart_common_descriptions ON cscart_common_descriptions.object_id = cscart_images.image_id 
  AND cscart_common_descriptions.object_holder = 'images' 
  AND cscart_common_descriptions.lang_code = 'en' 
WHERE 
  cscart_images_links.object_type = 'product' 
  AND cscart_images_links.type = 'A' 
  AND cscart_images_links.object_id IN (
    67841, 68817, 67790, 67789, 67788, 67787, 
    67786, 67785, 67784, 67783, 67782, 
    67781, 67780, 67779, 67778, 67777, 
    67776, 67775, 67774, 67773, 67772, 
    67771, 68694, 68693, 68661, 68532, 
    68124, 68123, 68692, 68662, 68573, 
    68531, 68374, 68361, 68199, 67871, 
    67844, 67843, 67840, 68201
  ) 
ORDER BY 
  cscart_images_links.position, 
  cscart_images_links.pair_id

Query time 0.00043

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	cscart_images_links	range	object_id	object_id	81		40	Using index condition; Using filesort
1	SIMPLE	cscart_images	eq_ref	PRIMARY	PRIMARY	4	toolboxdigitalshop_dev.cscart_images_links.image_id	1
1	SIMPLE	cscart_common_descriptions	eq_ref	PRIMARY	PRIMARY	108	toolboxdigitalshop_dev.cscart_images.image_id,const,const	1	Using where