Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61a24d5a25f5acfbd926c35eb328a8d0385fcdaa65b95bb5243cf1d0cf84cef7' 
  AND token = 'VFlTsPdn8e9OfXxwSCx1J3qCf30QxtNgTmhW6qBDS6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}