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.detailed_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 = 'category' 
  AND cscart_images_links.type = 'M' 
  AND cscart_images_links.object_id IN (503, 504, 505, 506, 509, 853) 
ORDER BY 
  cscart_images_links.position, 
  cscart_images_links.pair_id

Query time 0.00239

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 6 Using index condition; Using filesort
1 SIMPLE cscart_images eq_ref PRIMARY PRIMARY 3 mahm3t_cs443.cscart_images_links.detailed_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

Result

pair_id object_id object_type image_id detailed_id type position emo_md5 image_path alt image_x image_y images_image_id
30288 504 category 0 25865 M 0 grenada1_01.png GRENADA RUSSET, Verblender aus Beton für innen und außen 1402 796 25865
30289 505 category 0 25866 M 0 stegu_monsanto1_003.jpg stegu MONSANTO RED, Ziegelriemchen mit grauer Fuge 602 337 25866
30293 509 category 0 25870 M 0 stegu_ak_impregnat_stone.jpg Verblender Imprägnierung 600 534 25870
30294 503 category 0 25871 M 0 timber1-2.jpg Stegu TIMBER WOOD, Verblender aus Beton für innen und außen 1920 1080 25871
30295 506 category 0 25872 M 0 PRETO_a_x0x3-q1.jpg dekorativ Naturstein, Stegu PRETO 1920 1280 25872