SELECT 
  cscart_product_filters.feature_id, 
  cscart_product_filters.filter_id, 
  cscart_product_filters.field_type, 
  cscart_product_filters.round_to, 
  cscart_product_filters.display, 
  cscart_product_filters.display_count, 
  cscart_product_filter_descriptions.filter, 
  cscart_product_features.feature_type, 
  cscart_product_features.filter_style, 
  cscart_product_features_descriptions.prefix, 
  cscart_product_features_descriptions.suffix, 
  cscart_product_filters.filter_group_id, 
  cscart_filter_groups_descriptions.name as fg_name, 
  cscart_filter_groups.display as fg_display 
FROM 
  cscart_product_filters 
  LEFT JOIN cscart_product_filter_descriptions ON cscart_product_filter_descriptions.filter_id = cscart_product_filters.filter_id 
  AND cscart_product_filter_descriptions.lang_code = 'es' 
  LEFT JOIN cscart_product_features ON cscart_product_features.feature_id = cscart_product_filters.feature_id 
  LEFT JOIN cscart_product_features_descriptions ON cscart_product_features_descriptions.feature_id = cscart_product_filters.feature_id 
  AND cscart_product_features_descriptions.lang_code = 'es' 
  LEFT JOIN cscart_filter_groups ON cscart_filter_groups.filter_group_id = cscart_product_filters.filter_group_id 
  LEFT JOIN cscart_filter_groups_descriptions ON cscart_filter_groups_descriptions.filter_group_id = cscart_product_filters.filter_group_id 
  AND cscart_filter_groups.status = 'A' 
WHERE 
  cscart_product_filters.status = 'A' 
  AND (
    cscart_product_filters.categories_path = '' 
    OR FIND_IN_SET(
      391, cscart_product_filters.categories_path
    )
  ) 
  AND (
    cscart_product_filters.ss_vendor_filtering_usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_product_filters.ss_vendor_filtering_usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_product_filters.ss_vendor_filtering_usergroup_ids
    )
  ) 
ORDER BY 
  cscart_product_filters.position, 
  cscart_product_filter_descriptions.filter, 
  cscart_filter_groups.position

Query time 0.00106

JSON explain

{
  "query_block": {
    "select_id": 1,
    "filesort": {
      "sort_key": "cscart_product_filters.position, cscart_product_filter_descriptions.filter, cscart_filter_groups.position",
      "temporary_table": {
        "nested_loop": [
          {
            "table": {
              "table_name": "cscart_product_filters",
              "access_type": "ALL",
              "rows": 36,
              "filtered": 100,
              "attached_condition": "cscart_product_filters.`status` = 'A' and (cscart_product_filters.categories_path = '' or find_in_set(391,cscart_product_filters.categories_path)) and (cscart_product_filters.ss_vendor_filtering_usergroup_ids = '' or find_in_set(0,cscart_product_filters.ss_vendor_filtering_usergroup_ids) or find_in_set(1,cscart_product_filters.ss_vendor_filtering_usergroup_ids))"
            }
          },
          {
            "table": {
              "table_name": "cscart_product_filter_descriptions",
              "access_type": "eq_ref",
              "possible_keys": ["PRIMARY"],
              "key": "PRIMARY",
              "key_length": "9",
              "used_key_parts": ["filter_id", "lang_code"],
              "ref": ["live_clonned.cscart_product_filters.filter_id", "const"],
              "rows": 1,
              "filtered": 100,
              "attached_condition": "trigcond(cscart_product_filter_descriptions.lang_code = 'es')"
            }
          },
          {
            "table": {
              "table_name": "cscart_product_features",
              "access_type": "eq_ref",
              "possible_keys": ["PRIMARY"],
              "key": "PRIMARY",
              "key_length": "3",
              "used_key_parts": ["feature_id"],
              "ref": ["live_clonned.cscart_product_filters.feature_id"],
              "rows": 1,
              "filtered": 100
            }
          },
          {
            "table": {
              "table_name": "cscart_product_features_descriptions",
              "access_type": "eq_ref",
              "possible_keys": ["PRIMARY"],
              "key": "PRIMARY",
              "key_length": "9",
              "used_key_parts": ["feature_id", "lang_code"],
              "ref": ["live_clonned.cscart_product_filters.feature_id", "const"],
              "rows": 1,
              "filtered": 100,
              "attached_condition": "trigcond(cscart_product_features_descriptions.lang_code = 'es')"
            }
          },
          {
            "table": {
              "table_name": "cscart_filter_groups",
              "access_type": "eq_ref",
              "possible_keys": ["PRIMARY"],
              "key": "PRIMARY",
              "key_length": "4",
              "used_key_parts": ["filter_group_id"],
              "ref": ["live_clonned.cscart_product_filters.filter_group_id"],
              "rows": 1,
              "filtered": 100
            }
          },
          {
            "block-nl-join": {
              "table": {
                "table_name": "cscart_filter_groups_descriptions",
                "access_type": "ALL",
                "rows": 5,
                "filtered": 100
              },
              "buffer_type": "flat",
              "buffer_size": "95Kb",
              "join_type": "BNL",
              "attached_condition": "trigcond(cscart_filter_groups_descriptions.filter_group_id = cscart_product_filters.filter_group_id and trigcond(cscart_filter_groups.`status` = 'A'))"
            }
          }
        ]
      }
    }
  }
}