SELECT 
  filter_id, 
  feature_id 
FROM 
  cscart_product_filters 
  INNER JOIN cscart_ult_objects_sharing ON (
    cscart_ult_objects_sharing.share_object_id = cscart_product_filters.filter_id 
    AND cscart_ult_objects_sharing.share_company_id = 1 
    AND cscart_ult_objects_sharing.share_object_type = 'product_filters'
  ) 
WHERE 
  status = 'A'

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_filters",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 12,
      "filtered": 100,
      "attached_condition": "cscart_product_filters.`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": [
        "noframes_angrybeaver.cscart_product_filters.filter_id",
        "const",
        "const"
      ],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "cscart_ult_objects_sharing.share_object_id = cscart_product_filters.filter_id and cscart_ult_objects_sharing.share_object_type = 'product_filters'",
      "using_index": true
    }
  }
}