SELECT 
  cscart_categories.*, 
  cscart_category_descriptions.*, 
  cscart_seo_names.name as seo_name, 
  cscart_seo_names.path as seo_path 
FROM 
  cscart_categories 
  LEFT JOIN cscart_category_descriptions ON cscart_category_descriptions.category_id = cscart_categories.category_id 
  AND cscart_category_descriptions.lang_code = 'de' 
  LEFT JOIN cscart_seo_names ON cscart_seo_names.object_id = 501 
  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 
  cscart_categories.category_id = 501 
  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.company_id = 1

Query time 0.00051

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_categories const PRIMARY,c_status,p_category_id,idx_category_id PRIMARY 3 const 1
1 SIMPLE cscart_category_descriptions const PRIMARY PRIMARY 9 const,const 1
1 SIMPLE cscart_seo_names const PRIMARY,dispatch PRIMARY 210 const,const,const,const,const 1

Result

category_id parent_id id_path level company_id usergroup_ids status product_count position timestamp size_chart_id is_op localization age_verification age_limit parent_age_verification parent_age_limit selected_views default_view product_details_view product_columns is_trash staff_notes action lang_code category description meta_keywords meta_description page_title age_warning_message custom_header seo_name seo_path
501 0 501 1 1 0 A 1 80 1376949600 0 N N 0 N 0 a:3:{s:21:"products_multicolumns";s:21:"products_multicolumns";s:24:"products_without_options";s:24:"products_without_options";s:10:"short_list";s:10:"short_list";} products_multicolumns default 0 N de Dekoration <p>Bauen Sie ein neues Haus und brauchen den letzten Schliff, um ihm ein einzigartiges Aussehen zu verleihen? Oder mochten Sie Ihrem Raum, in dem Sie bereits wohnen, einen neuen Look verpassen? Bei uns im Angebot finden Sie verschiedene Sorten von Verblender und Wandpaneele,&nbsp;mit denen Sie eine Vielzahl von dekorativen Projekten realisieren können.&nbsp;Ihre Kreativität hat einen weiten Spielraum.</p> ♢Verblendsteine für Innen und Außen | ♢Ziegelriemchen | ♢Wandpaneele | ♢Deco Elemente günstig online kaufen » ♢Jetzt online bei baubaY.de bestellen ☏03075439286☏ ♢ Dekoration - Verblender und Wandpaneele ♢ dekoration