Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52ef12c3fb72b53445e26000e0d4fc47e4ef454a069b9912e5a54546be692974' 
  AND token = 'hISM1o9Dh3cBy2v6i9cJMKV+I4dAyY0RI0eyMZDlvow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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