Oklahoma gives you two hours of paid leave to vote (more if the polls are far) when you do not have three non-working hours while the polls are open. You must give notice three days in advance, and the employer may set the hours.
Voting leave in Oklahoma
Good to know
Most voting-leave laws only apply when your work schedule does not already leave you enough time to vote, often two or three consecutive non-working hours while the polls are open. Where leave is required, the employer can usually decide whether you take it at the start or end of your shift. Early voting and mail-in ballots can change what applies to you. This is general information, not legal advice.