Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2cb3bf0f72bb04cafa12bd55c2bcb24396e564bb63b7fdee914ad38b11e0921f' 
  AND token = 'xpxEUph0T4CRaJBjwkJHLXAyv9aTDlta89sS0jK8EEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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