Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2498845ffb4785ebf413f093a9cb84baa6948e550d722d2caeda8d20f0c50ecf' 
  AND token = 'D363ppr4zQ0XOZRErInDIAk0hxeytUo+xkxEkX0tuY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}