Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cbccaaf909883d97d7cceef2f7863b2ae3ca573910662b301b80133eaa3518f' 
  AND token = 'z9tObrVUEBB3kE94qbnWt9jntTtr8jEOEgvkpUvrxFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}