Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '974966c1b9a9e00de42f64074420788f6aeffc89a185fb45d30e01d49d640fb5' 
  AND token = 'Zi7l3LWPth55RQhgxSif9jVJ2gocaxkkBt0QCVBTo3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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