SELECT 
  cscart_languages.* 
FROM 
  cscart_languages 
  INNER JOIN cscart_ult_objects_sharing ON (
    cscart_ult_objects_sharing.share_object_id = cscart_languages.lang_id 
    AND cscart_ult_objects_sharing.share_company_id = 1 
    AND cscart_ult_objects_sharing.share_object_type = 'languages'
  ) 
WHERE 
  1 
  AND cscart_languages.status = 'A'

Query time 0.00025

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_languages ALL PRIMARY 3 Using where
1 SIMPLE cscart_ult_objects_sharing eq_ref PRIMARY PRIMARY 159 d38744sd170579.cscart_languages.lang_id,const,const 1 Using where; Using index

Result

lang_id lang_code name status country_code
2 ru Русский A RU
4 ee Eesti A EE