Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa200b63f89304430bd66bd9c17b3ca2c03b34b73726de93b2f53647e94797cf' 
  AND token = '2LK+ji3nzGhT+po/gVEpDIyi2LSzy0XDu3pm1mXbFg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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