Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b704fdb5d0dc91bc3f58fcc81c36194f447768462c7078d200dd6cb2061ffc4' 
  AND token = 'jYtrjBtLPnB+sCOV/CVML0giD9H96ThYrBYhXlOSVxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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