Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eca315edfeae57898443813d914f132ceb89ed0cf08b8848de65d3a362a8a82' 
  AND token = 'PGdp7fy8TChkkO2JU2YsrSXBekDlzGHM98r3U95Hd/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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