Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2798bfc9384bf24a30fd74b95225f08d567faa75ed41be0e8152f6fc11746768' 
  AND token = '7Ag3XvGFX2HeOy8gjaI27VyCg5BsBWo+S5FnbPT2q4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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