Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6ffcb50db64e541b2c04a1f171e2026e6b44c89c905291f129759582c8f7581' 
  AND token = 'p8mCce3teYkehMp7XK0uCjRZTMWCH1JmEzO6P/ADHqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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