crwdns2933423:0crwdne2933423:0
crwdns2918538:0crwdne2918538:0

crwdns2934241:0crwdne2934241:0 livfe

crwdns2934249:0crwdne2934249:0:

Try going to start up disc in the system preferences and unlock and select the internal SSD.

I have had this issue arise a few times and have come to the conclusion that the system is searching for boot devices which is causing the delay. If this didn't solve anything then it can be possible there is another issue and a SMC / PRAM reset might be helpful as mentioned by Dan.

crwdns2915684:0crwdne2915684:0:

open