Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7174c1babc7792b831faa953d284b4127d5469dfca5b2607d0058c79437580d5' 
  AND token = 'K8zkHrzkYKf3k5zWqMWWkyLjA89ZglL9yFsGMZOFtnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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