Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ccf7298a55f4e03e1b09365d121348b8ce8b0541546dcd4f8135ebe6a07fff2' 
  AND token = 'kfC9un3nH5QJL3wIoZT5PayZ9v1cWnxMfkosvVw/4Nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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