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SELECT 
  tax_id, 
  address_type, 
  priority, 
  price_includes_tax, 
  regnumber 
FROM 
  cscart_taxes 
WHERE 
  tax_id IN (7) 
  AND status = 'A' 
ORDER BY 
  priority

Query time 0.00004

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}