Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4670de94b9240353be4aa162bf85a4f75e64a18482a77825bb8b6f2db755eb39' 
  AND token = 'aXufbWlDYxJW7E1Hz/MiazC/o6efK31q6j5nrSdRZDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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