Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fe53dfc5b66d057dd02f5cf5f8c16bfb042e5f98719db5e8914c239c14f562b' 
  AND token = '4zZHp6dx4FKU04hf7j6zlHkeWKRmqdrLrpNzvgIjg6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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