Sandbox

SELECT 
  cscart_product_feature_variant_descriptions.*, 
  cscart_product_feature_variants.*, 
  cscart_product_features_values.variant_id as selected, 
  cscart_product_features.feature_type, 
  cscart_seo_names.name as seo_name, 
  cscart_seo_names.path as seo_path 
FROM 
  cscart_product_feature_variants 
  LEFT JOIN cscart_product_feature_variant_descriptions ON cscart_product_feature_variant_descriptions.variant_id = cscart_product_feature_variants.variant_id 
  AND cscart_product_feature_variant_descriptions.lang_code = 'tr' 
  INNER JOIN cscart_product_features_values ON cscart_product_features_values.variant_id = cscart_product_feature_variants.variant_id 
  AND cscart_product_features_values.lang_code = 'tr' 
  AND cscart_product_features_values.product_id = 1145 
  LEFT JOIN cscart_product_features ON cscart_product_features.feature_id = cscart_product_feature_variants.feature_id 
  LEFT JOIN cscart_seo_names ON cscart_seo_names.object_id = cscart_product_feature_variants.variant_id 
  AND cscart_seo_names.type = 'e' 
  AND cscart_seo_names.dispatch = '' 
  AND cscart_seo_names.lang_code = 'tr' 
WHERE 
  1 
  AND cscart_product_feature_variants.feature_id IN (550) 
GROUP BY 
  cscart_product_feature_variants.variant_id 
ORDER BY 
  cscart_product_feature_variants.position, 
  cscart_product_feature_variant_descriptions.variant

Query time 0.00056

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	cscart_product_feature_variants	ref	PRIMARY,feature_id	feature_id	3	const	7	Using where; Using temporary; Using filesort
1	SIMPLE	cscart_product_features	const	PRIMARY	PRIMARY	3	const	1
1	SIMPLE	cscart_product_feature_variant_descriptions	eq_ref	PRIMARY	PRIMARY	9	hobilifedt.cscart_product_feature_variants.variant_id,const	1	Using where
1	SIMPLE	cscart_seo_names	ref	PRIMARY,dispatch	PRIMARY	206	hobilifedt.cscart_product_feature_variants.variant_id,const,const,const	1	Using where
1	SIMPLE	cscart_product_features_values	ref	variant_id,lang_code,product_id,idx_product_feature_variant_id	idx_product_feature_variant_id	3	const	13	Using where; Using index

Result

variant_id	variant	description	page_title	meta_keywords	meta_description	lang_code	gr__sf_seo_variant	feature_id	url	color	position	selected	feature_type	seo_name	seo_path
1214	BSG					tr		550			0	1214	E	bsg