Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '852c4708f22b3dfcff2ca7800ffcea06d4fa95cef56467b1ba446317f1ce383c' 
  AND token = 'kVPqbPs2azUqd2Yw0aQelo5K3vC9zVgEPoTmumwig5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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