Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98cc6b9a1468e726c459f0712adf3e7ab6acbb76300708388748ae398cb4738f' 
  AND token = 'gm7/zbFJkL27lUw9wmC2JsvJ62x9Rz/WOxHcd8DXbMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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