SELECT 
  ss_vendor_filtering_vendor_product_id 
FROM 
  cscart_companies

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_companies",
          "access_type": "ALL",
          "rows": 31,
          "filtered": 100
        }
      }
    ]
  }
}