Assalamu Alaykum wa Rahmatu Allahi wa Barakatuh

At this age, insurance companies do not give you any good pension anyway. Insurance is not permissible, according to majority, because as an exchange contract it contains Gharar (ambiguity) in regards to its final outcome (in this example how many payments of pension you will receive because we do not know when one is going to die).

If Islamic insurance is available, you should go for it. if it is not available and you need really insurance (any kind of insurance) you may go for conventional insurance provided you avoid Riba (interest). Any pension insurance contract  done with any insurance company is based solely on interest in addition to the probability of life expectancy because you pay now an amount of money and they give you back an annual or periodical amount, the difference is interest.

This does not include two kinds of pensions: the obligatory pension that is done in many countries like the social security in America and the employment pension that many companies have for their workers. These both are based on employment.

Wa Allahu A’alam