Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2520009804b3425fa3ca3efb12ba63b321272246ca56af1cfc31aea7d7d1ed56' 
  AND token = 'lgHI3AWULrkaJzr1/6pyR5VnCDbJS6aGHdoDtD95pxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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