Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b948a0f9e6b65c33ab50713701046fa699066c581c91bebc65c3b6585270cc33' 
  AND token = 'ww1wyRQXZt3hbZDOpTxIxnbqrnwyygbZsYPnmpBqA00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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