Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e46cad76de938d47c7ee6d3ae0c10de62dfe7ebc4cc28104fb145b807b03a57' 
  AND token = 'ob7+g7lUI764Yzfm9jXKIg+VzI9GmWeNr55r2WiTGIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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