Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2428f74e63817fd1a15ecc2ef9fda3aa150d68dc71292e07f268427a72c4adb9' 
  AND token = 'krEfpMOsqrsA7xvBdT8eh7cAA7Z5P5Ud1+t9hMkMzUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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