Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff96ed005d9e9938cee84dc1c35ae2781faf1d79e03379d07fc82b87349da2dc' 
  AND token = 'r6c/8edA5MVk/kAqMqFKoodngIdaPaoTqbnWBZxew8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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