Sandbox

SELECT 
  cscart_images_links.*, 
  cscart_images.image_path, 
  cscart_common_descriptions.description AS alt, 
  cscart_images.image_x, 
  cscart_images.image_y, 
  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 = 'de' 
WHERE 
  cscart_images_links.object_type = 'variant_image' 
  AND cscart_images_links.type = 'V' 
  AND cscart_images_links.object_id IN (
    15689, 15690, 15691, 15692, 7668, 7670, 
    7671, 7673, 7676, 11878, 11877, 19507, 
    15665, 15666, 15667, 15668, 15669, 
    15670, 15671, 7677, 7678, 7679, 7680, 
    7681, 7682, 7683, 7684
  ) 
ORDER BY 
  cscart_images_links.position, 
  cscart_images_links.pair_id

Query time 0.00089

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		27	Using index condition; Using filesort
1	SIMPLE	cscart_images	eq_ref	PRIMARY	PRIMARY	3	mahm3t_cs443.cscart_images_links.image_id	1	Using where
1	SIMPLE	cscart_common_descriptions	eq_ref	PRIMARY	PRIMARY	107	mahm3t_cs443.cscart_images.image_id,const,const	1	Using where