# models.py

class CacheTable(models.Model):
    cache_key = models.CharField(max_length=255, primary_key=True)
    value = models.TextField()
    expires = models.DateTimeField(null=True, blank=True, default=None)

    class Meta:
        db_table = '<cache-table-name>'


# admin.py


class CacheTableAdmin(admin.ModelAdmin):
    list_display = ('cache_key', 'expires')
    search_fields = ('cache_key', )

admin.site.register(CacheTable, CacheTableAdmin)