Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25e3c660557fc1c8ad5180f6b5d680e2624ebc9e5698731e8b993d407be99722' 
  AND token = 'hKJ61FqOBf7RzSdvmr90MsyIazA2NtDiaA0VUMw5DRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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