discord.py How can I send a message if difference between the time of message and current time is above time I specified?

timestamp = f'{message.created_at}'
msg_time = datetime.strptime(timestamp, '%Y-%m-%d %H:%M:%S.%f')
now_time = datetime.now()
diff = now_time - msg_time


print('msg_time:', msg_time)
print('now_time:', now_time)
print('diff    :', diff)

output :

msg_time: 2022-07-22 06:02:12.934000
now_time: 2022-07-23 01:53:52.375086
diff    : 19:51:39.441086

If diff is greater than the time I specify, I want it to send a message to the channel like this:

if diff > 00:01:00.000000:
  title2 = "test."
  embed2 = discord.Embed(title=title2, color=0xf1c40f)
  msg = await channels.send(embed=embed2)

I made it here so that if it's longer than 1 minute, it can be sent, but I don't know exactly, so it doesn't work, how can I do it?