Sandbox

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 = 'en' 
  LEFT JOIN cscart_seo_names ON cscart_seo_names.object_id = 396 
  AND cscart_seo_names.type = 'c' 
  AND cscart_seo_names.dispatch = '' 
  AND cscart_seo_names.lang_code = 'en' 
  AND cscart_seo_names.company_id = cscart_categories.company_id 
WHERE 
  cscart_categories.category_id = 396 
  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 = 2

Query time 0.00039

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows
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
396	386	386/396	2	2	0	A	0	30	1351638000	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			en	Floors	<h2>With wooden floor you'll take your interior to the next level.</h2> <p style="text-align: justify;">We offer a wide range of wooden floor, produced in Poland by company named Barlinek. 100% wood-parquet from our website is super quality, durable and damage resistant, thanks to it's structure. 3-layer wood, glued together make the floorboard solid and non-deformable. This floorboard won't swell, squeak or dry out causing splits. Laquered or matt cover protects the wood from damages and moisture. What is very important - our wooden parquet has comfortable in using, tounge-and-groove joints system, ensuring fast installation. You have plenty colors and designes to chose - to follow your needs and your interior design. There are boards available with 6 strips, 3 strips, 1 strip, but also you can choose whether you want many knots to be visibled or not.</p>	wooden floor, ash, oak, under-heating, joints, parquet, cross-structure, laquer, oiled, matt	✓wooden floor ✓wooden parquet ✓ash wood ✓oak wood ✓many colors / designes ✓durable ✓3 layer wood ✓comfortable joints ✓over under-floor heating ✓high abrasion resistance ✓1, 3, 6-strip patterns ✓laquered or matt varnished ✓check it now!	Elegant 100% floorboards \| byggbay.se			floors-en	386