Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7103069ca140f1bab98c24ce8b5765463cba5e848a499aeb06315af7a96e9bc2' 
  AND token = 'MA9HbEn/wRu6scs5CJXE8WQZNMFrKqwTNd/Y9xb6Jgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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