Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63d44808c29edbee46ee35755662df2eef01090ca6a505c765b0787b471c7d71' 
  AND token = 'Lx1OfkgBA0ifWzpp20dvRA41tXeUv0xmhE20sYmJlnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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