import datetime
from typing import Optional, Any


def is_valid_unix_timestamp(ts: Any, range: Optional[int] = 60) -> bool:
    """
    Checks if the given value is a valid UNIX timestamp (in seconds).

    Args:
        ts (int): Timestamp to validate.

    Returns:
        bool: True if valid UNIX timestamp, False otherwise.
    """
    if not ts or ts == 0:
        return False
    if not isinstance(ts, int):
        return False
    try:
        # Check if datetime.fromtimestamp works and the value is in a reasonable range
        datetime.datetime.fromtimestamp(ts, datetime.timezone.utc)
        if not range:
            return True
        # Accept timestamps in a reasonable window, +/- given seconds (default 60)  from now
        now = datetime.datetime.now(datetime.timezone.utc)
        earliest = now.timestamp() - range
        latest = now.timestamp() + range
        return earliest <= ts <= latest
    except (OverflowError, OSError, ValueError):
        return False
