Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45407a7bf43ba3bc874a2b7213f60f9de64daec61f8718a302ce9b7fb04f7eeb' 
  AND token = 'iiAgEGRyTGzkW5GZkSRnPmhwZDs8iP7AaitiGIzkGvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}