Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eeac255eba8fd76f2703a7e01e1d9fdbd0206554e5a0ae7e7e80fb08182bf5d4' 
  AND token = '7Y4nGQIvJg+edPvpFYzolxmczmU6RsufH12YCHWi0BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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