chelovek on "MYSQL cron explanation help"

Hello,
I am analyzing MYSQL side of Wordpress and found code below for scheduled post:
i:1459196504;a:1:{s:19:"publish_future_post";a:1:{s:32:"8olmjno1k05rb1som1frr6u854";a:2:{s:8:"schedule";b:0;s:4:"args";a:1:{i:0;i:27;}}}}
Trying to figure out what s:32:"8olmjno1k05rb1som1frr6u854" stands for and where it was gotten from or how created.