Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78a69fec1bce0c2a69e5a988a5af3f797d290a6eda4645c9dc6ecf56f45bfe77' 
  AND token = 'pWyaDFS0OYVETKu/xFZmfDp2qZAKAiKCd00fJJHJ6j0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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