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SELECT 
  cscart_product_features.feature_id, 
  cscart_product_features.feature_code, 
  cscart_product_features.company_id, 
  cscart_product_features.feature_type, 
  cscart_product_features.parent_id, 
  cscart_product_features.display_on_product, 
  cscart_product_features.display_on_catalog, 
  cscart_product_features.display_on_header, 
  cscart_product_features_descriptions.description, 
  cscart_product_features_descriptions.lang_code, 
  cscart_product_features_descriptions.prefix, 
  cscart_product_features_descriptions.suffix, 
  cscart_product_features.categories_path, 
  cscart_product_features_descriptions.full_description, 
  cscart_product_features.status, 
  cscart_product_features.comparison, 
  cscart_product_features.position 
FROM 
  cscart_product_features 
  LEFT JOIN cscart_product_features_descriptions ON cscart_product_features_descriptions.feature_id = cscart_product_features.feature_id 
  AND cscart_product_features_descriptions.lang_code = 'en' 
  INNER JOIN cscart_ult_objects_sharing ON (
    cscart_ult_objects_sharing.share_object_id = cscart_product_features.feature_id 
    AND cscart_ult_objects_sharing.share_company_id = 1 
    AND cscart_ult_objects_sharing.share_object_type = 'product_features'
  ) 
WHERE 
  cscart_product_features.feature_id = 42

Query time 0.00032

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	cscart_product_features	const	PRIMARY	PRIMARY	3	const	1
1	SIMPLE	cscart_product_features_descriptions	const	PRIMARY	PRIMARY	9	const,const	1
1	SIMPLE	cscart_ult_objects_sharing	const	PRIMARY	PRIMARY	159	const,const,const	1	Using index

Result

feature_id	feature_code	company_id	feature_type	parent_id	display_on_product	display_on_catalog	display_on_header	description	lang_code	prefix	suffix	categories_path	full_description	status	comparison	position
42		1	S	0	N	N	N	Product	en			354,355,356,362,368,438,449,452,555,556,770,771,783,787,789,790,261,357,359,360,365,367,369,459,461,468,472,475,484,485,486,487,797,799,805,808,813,814,817,820,831,842,843,844,848,849,850,890,891,437,897,898,899,900,901		A	N	10