Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f9d230228a57a15bf4b70b2a881977a2d8c592ca33b09f38e28f9071f333e3b' 
  AND token = 'WDN/4b9k+PXEWAmhm04TE8wc3IUs4R8PGCqvvLfBbcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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