SELECT 
  cscart_profile_fields.*, 
  cscart_profile_field_descriptions.description, 
  cscart_profile_fields.profile_required as required 
FROM 
  cscart_profile_fields 
  LEFT JOIN cscart_profile_field_descriptions ON cscart_profile_field_descriptions.object_id = cscart_profile_fields.field_id 
  AND cscart_profile_field_descriptions.object_type = 'F' 
  AND lang_code = 'en' 
  INNER JOIN cscart_ult_objects_sharing ON (
    cscart_ult_objects_sharing.share_object_id = cscart_profile_fields.field_id 
    AND cscart_ult_objects_sharing.share_company_id = 1 
    AND cscart_ult_objects_sharing.share_object_type = 'profile_fields'
  ) 
WHERE 
  1 = 1 
  AND cscart_profile_fields.profile_type = 'U' 
  AND cscart_profile_fields.profile_show = 'Y' 
  AND cscart_profile_fields.field_type != 'E' 
ORDER BY 
  cscart_profile_fields.position

Query time 0.00107

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "table": {
          "table_name": "cscart_profile_fields",
          "access_type": "ref",
          "possible_keys": ["PRIMARY", "profile_show"],
          "key": "profile_show",
          "key_length": "4",
          "used_key_parts": ["profile_show"],
          "ref": ["const"],
          "rows": 12,
          "filtered": 100,
          "index_condition": "((cscart_profile_fields.profile_show = 'Y') and (cscart_profile_fields.field_type <> 'E'))",
          "attached_condition": "((cscart_profile_fields.profile_show <=> 'Y') and (cscart_profile_fields.profile_type = 'U'))"
        }
      }
    },
    "table": {
      "table_name": "cscart_profile_field_descriptions",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "12",
      "used_key_parts": ["object_id", "object_type", "lang_code"],
      "ref": ["egkcysbp_cscartn.cscart_profile_fields.field_id", "const", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(((cscart_profile_field_descriptions.object_type = 'F') and (cscart_profile_field_descriptions.lang_code = 'en')))"
    },
    "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": ["egkcysbp_cscartn.cscart_profile_fields.field_id", "const", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "((cscart_ult_objects_sharing.share_object_id = cscart_profile_fields.field_id) and (cscart_ult_objects_sharing.share_object_type = 'profile_fields'))",
      "using_index": true
    }
  }
}