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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 = 'en' 
  LEFT 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 = 'en' 
  AND cscart_product_features_values.product_id = 3325 
  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 = 'en' 
  AND (
    cscart_seo_names.company_id = 2 
    OR cscart_seo_names.company_id = 0
  ) 
WHERE 
  1 
  AND cscart_product_feature_variants.feature_id IN (136) 
GROUP BY 
  cscart_product_feature_variants.variant_id 
ORDER BY 
  cscart_product_feature_variants.position, 
  cscart_product_feature_variant_descriptions.variant

Query time 0.00196

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	cscart_product_feature_variants	ref	feature_id	feature_id	3	const	5	Using where; Using temporary; Using filesort
1	SIMPLE	cscart_product_feature_variant_descriptions	eq_ref	PRIMARY	PRIMARY	9	mahm3t_cs443.cscart_product_feature_variants.variant_id,const	1	Using where
1	SIMPLE	cscart_product_features_values	ref	variant_id,lang_code,product_id,product_id_idx,variant_id_idx,product_feature_idx	product_id	3	const	74	Using where
1	SIMPLE	cscart_product_features	const	PRIMARY	PRIMARY	3	const	1
1	SIMPLE	cscart_seo_names	ref	PRIMARY,dispatch	PRIMARY	206	mahm3t_cs443.cscart_product_feature_variants.variant_id,const,const,const	2	Using where

Result

variant_id	variant	lang_code	feature_id	position	selected	feature_type
5972	Bedroom	en	136	5	5972	M
5973	Living room	en	136	10		M
5974	Bathroom	en	136	15		M
5975	Kitchen	en	136	20		M
5976	Kids room	en	136	25	5976	M
5977	Home office	en	136	30		M