Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f045cdda0d814bb402ef687715d1b95152c77190e00861ee539efaf9ef78a608' 
  AND token = 'QZzZu/MEZyiAF4ORFwqJ3XQqnq8sAKwbrGb1cm43o8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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