Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29b4bcf82672df544e92b1a884f66927a463599f3d7c9ffd13b93faf5a305b82' 
  AND token = 'yLHL158iRn6hG+IivIT+bPe9tPCfHMAhw9QgYoHgfNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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