Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1684b0a382863d5bba4a6b149af91df0157bca6bebd36c4a23ae1d9b61c75810' 
  AND token = '3iR6JXJ2oTx2isoj9TZZNXHXgFOHQcTaS5lIrNxPhbU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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