Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fc10ed6689297ea0d8f8d05492d6ab6697bf1efd336b421b56c2724bb753a69' 
  AND token = 'TbYp+7GcsTJJ63VlxR5pTZN73WfUzlekurbDQIO0A/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}