Can CoolCoins actually be claimed currently?
Kinda. Coolcoins still exist, just like any other ERC-20 token on the Ethereum blockchain. They just currently cost far more to exchange ($26 is today's rate) than what they are actually "worth". *
I'm still hopeful that the Ethereum team will fix this at some point. They kind of have to if they want to survive as a platform. If Coolcoin was a Solana token (for example) you can move them for a few pennies.
* Worth being a relative term in crypto. I set the exchange rate at 1,000 Coolcoin for a space kitty t-shirt awhile ago. Only two people on the planet (I'm one of them) actually has enough Coolcoin to afford that.
I guess that someone could decide that Coolcoin is the next Bored Ape and give me a million dollars for them, but somehow I doubt it.