Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '655c2899f7b39ee5d64c57ccb3a2286a85f490e08ebe694a4aebebc61ba094f1' 
  AND token = '8GFwvUkQlnUVQf3cUKMrYgHEilplzTxRyVdLIhRmty8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}