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 0.00086

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_languages",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "cscart_languages.`status` = 'A'"
    },
    "table": {
      "table_name": "cscart_ult_objects_sharing",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "159",
      "used_key_parts": [
        "share_object_id",
        "share_company_id",
        "share_object_type"
      ],
      "ref": ["gul10001_cs452.cscart_languages.lang_id", "const", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "cscart_ult_objects_sharing.share_object_id = cscart_languages.lang_id and cscart_ult_objects_sharing.share_object_type = 'languages'",
      "using_index": true
    }
  }
}

Result