Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5116dbb6f9f736d817670d65017a67627102ce2ed986b3ec481eb6a6f855ae18' 
  AND token = 'yY0n6rGaEGWuq/6dHQhH22PDqLkZRquG6+62TAhte9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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