Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5618660a3d9c22df963c4c8b68a18c157f3fd3a6d0cf38bcdf17f029b5c036b' 
  AND token = 'rwz+Zc/bvf6c/SoYK6Bfv3BgF7OkHWHx34hxLRluzLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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