Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '150d9e3903c4b2661bf8f929a7e1f1f782e8c9955d7566957ecbcf60886b7350' 
  AND token = 'iT7uYd/LFP8ltMseNdb6lvNDkb4c/Ao/Gz+7O5M85Hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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