Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79a9343ccd977595083a9bf8ce15dae8960cdcd4d166b94f46ae89ab736f97dd' 
  AND token = 'Nu1seS5FGyEO4/SnigjCTC6A+5sn2eRcN9UoxOK55wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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