Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '030cf1c16c39032e8f2fc62d1cda2ce9a3aa947ba2a496e002c6ba2f4085edf8' 
  AND token = 'YYSkwfNal4NwBkdYzeEkDAiFzpMYRrGW7mQSyfgiP14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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