Oklahoma and Missouri are both members of the Drivers License Compact (DLC) which typically means that the Oklahoma speeding ticket conviction would be reported back to your home state of Missouri.
Oklahoma motor vehicles statutes (section 18-101) states that the judge or magistrate of a court shall keep record of every traffic complaint, traffic citation or traffic charge presented to the court or its traffic violations bureau. The record can include the conviction, judgment of acquittal, and amount of fine, and other citation information.
The court upon charge or conviction of any law violation shall forward this information onto the OK Department of Public Safety. The DPS is then supposed to, according to the DLC, forward this information onto the Missouri Department of Revenue's Driver Division.
The Missouri DOR does not state specifically what it does with out of state traffic violation information. So you should contact the Department of Revenue and find out if this 10 mph Oklahoma speeding ticket will be added to your record or assigned points.
If the out of state ticket is not put on your MO driving record than it is unlikely, but not impossible, that your insurance would see the out of state traffic violation. There might be other motor vehicle laws that the attorney you spoke to is aware of that we are not, by checking with the MO DOR you should be able to get a clear answer.