Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95b5c9bcc99489bdf46982306795dda871a4475ea5592274b61210ececd15a67' 
  AND token = 'dhrEBZKvx5WptpXxa+fmxvS+ljYqrftBpN9C1h8KSd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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