Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afcf1cbb39ed7d79dd7b4046e95082086877434a82eb1d8cf779d596a1ff4ce3' 
  AND token = 'SQcbKKhF/yglvaZV2yxtk2m7KcZHk7t8DmGMKObeuZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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