Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97fd3c9b0a0282d561e36fb6352ebf1c2313e3925205fe87b27ca7ab7d116712' 
  AND token = 'UYEZuUtgQNvVaVno7Qcz0+5QGQJP38PcfVXuUEI5OdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}