Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '617c4f1460ae3760d91184c8d1493e2fdfd63d44a00ec9e610d4fc1ddf4bee37' 
  AND token = 'kuElPzRwNg/IN7tM5yrcGY1ZGCtvhuAzp9RIP0dldWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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