While I'm not the most experienced at query letters, I can give you my opinion and maybe it will be of some use to you. Take everything I say with a fistful of salt, it's merely the impression I get when reading the query and some thoughts on what I would do to improve it.
Dear [agent name],
My novel tells the story of the Viking god Baldr, the god who dies. I personally love viking stories, so this hook works for me. But I think you should consider changing the hook to also suit other types of people.
Baldr’s world is coming to an end. Nice. The bees know it. The stars know it. Maybe it would be better to stop here with the list of things that know the end is coming. You don't need the next sentence. There's plenty of impact here and I think that the more you hammer this particular nail, the more of that impact is lost. These 3 sentences are also a good hook I think--with some rework. All the harbingers of the future know it. Before Baldr can do anything about Armageddon, though, he’s got problems closer to home: his fiancée is a spy. And a cannibal. She’s a cannibal spy with plans to murder Baldr’s whole village. I think that for people not familiar with Baldr, you need to give more details about him. Why is a god living in a village? What are his powers? Right now, all we know is that he's the god that dies. Also, if the world is coming to an end, why care about the village so much? If the end of the world isn't stopped, his village is destroyed anyway. Not permitted to leave his home and with only the help of his one-time enemy, the goddess Hel, Baldr has one, magical shot at ending his engagement .
All the gods will die. Baldr will die before most of them. But will he save his village first? Again, this is the end of the world type thing, so even if he saves the village, won't it be destroyed anyway?
BALDR THE DEAD is a 93,000-word long adventure I have some problems myself with genre, so I'm not one to judge, but are you sure long adventure is a thing?. A love story. A tale of divine warfare, riddling witches and exploding fish. Like Patrick Rothfuss’s ‘The Name of the Wind’, it is a coming-of-age fantasy narrative, but told with a distinctive narrative voice comparable to that of Susanna Clarke.
While I’m not currently an Old Norse god, I do research them at [bio details].
Thank you for your time and consideration.
I think the premise is awesome, but the query needs more details. It seems kind of short to me. Queries are supposed to be short, but I think you can add more words. If you stick to within 250-270 words, I think you'll be fine. There's a lot of rich content you can pack into your query. It's just my opinion, but I think you'll add more nuance with more detail.
Again, I'm also just starting, so listen to other opinions as well, then make up your own mind. But I hope my comments will help you along the way. Keep at it and good luck!