Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eeffd898987d9a57944becebbd8b1dccaec5796b1c8fd61c79c49ceab8a43d9' 
  AND token = 'eLnRQFwtBDp4A1fZJ9NP/acyUnXswQ0oeIwz09jpG3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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