Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01947431296f48ba92c24eb1736b23c87ca17e85ec308cc27097616887dc5b1d' 
  AND token = 'WmUpcGns17BaHKVmhWG70meCjbSILJw7ovIEGVlGAsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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