SELECT 
  cscart_categories.category_id, 
  cscart_categories.parent_id, 
  cscart_categories.id_path, 
  cscart_category_descriptions.category, 
  cscart_categories.position, 
  cscart_categories.status, 
  cscart_categories.company_id, 
  cscart_seo_names.name as seo_name, 
  cscart_seo_names.path as seo_path 
FROM 
  cscart_categories 
  LEFT JOIN cscart_category_descriptions ON cscart_categories.category_id = cscart_category_descriptions.category_id 
  AND cscart_category_descriptions.lang_code = 'de' 
  LEFT JOIN cscart_seo_names ON cscart_seo_names.object_id = cscart_categories.category_id 
  AND cscart_seo_names.type = 'c' 
  AND cscart_seo_names.dispatch = '' 
  AND cscart_seo_names.lang_code = 'de' 
  AND cscart_seo_names.company_id = cscart_categories.company_id 
WHERE 
  1 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A') 
  AND cscart_categories.parent_id IN (423) 
  AND cscart_categories.id_path LIKE '416/423/%' 
  AND cscart_categories.company_id = 1 
ORDER BY 
  cscart_categories.is_trash asc, 
  cscart_categories.position asc, 
  cscart_category_descriptions.category asc

Query time 0.00125

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_categories range c_status,parent,id_path,idx_id_path id_path 767 4 Using index condition; Using where; Using temporary; Using filesort
1 SIMPLE cscart_category_descriptions eq_ref PRIMARY PRIMARY 9 mahm3t_cs443.cscart_categories.category_id,const 1 Using where
1 SIMPLE cscart_seo_names eq_ref PRIMARY,dispatch PRIMARY 210 mahm3t_cs443.cscart_categories.category_id,const,const,const,const 1 Using where

Result

category_id parent_id id_path category position status company_id seo_name seo_path
445 423 416/423/445 Gipskartonplatten 10 A 1 gipskartonplatten 416/423
426 423 416/423/426 OSB Platten 20 A 1 osb-platten 416/423
455 423 416/423/455 Ständerwerk | Metallprofile 20 A 1 trockenbau-profile 416/423
465 423 416/423/465 Gipspachtel & Mörtel 30 A 1 gipspachtel-und-moertel 416/423
466 423 416/423/466 Trockenbau Zubehör 30 A 1 trockenbau-zubehoer 416/423
855 423 416/423/855 Farben 40 A 1 innenfarben 416/423