Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a8edb147916dfdb1dc6c7d6e1198bb2c40279f57738eb90ec4f3a522ca99920' 
  AND token = 'WkQPtzo8mJp+5yHYNlg1Nco17XNs1hYXaXbVdFM8RtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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