Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5514e2d810c97962ab1a7ec16e6dc77646ac53a4e92807ba4a75445d88bf93cf' 
  AND token = 'KmUotD2hh7fmI+/oN0k1M7xv2R58t1mhcj5+CD1RvNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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