Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2366b46b137df429726ed1bd90c7401ed90a76224a5f1433c8a2ccf6c4d6358' 
  AND token = 'MD1DwgpPY5znubybckGdXi3weWeTgecZER6KQU/rq84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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