Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca1ab1a3616a77321e253a40bcc6b87e159665139b95c71173b47f8eff205724' 
  AND token = '+kJcAF9LCpdklxTVWx4eVbRKT5USk9v8t4cXNwrpGTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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