Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7377d9272d45c8e75f68f6233c4bc54f08784a02689fb9d8ae23c67cf8c6adf3' 
  AND token = 'K1eHMr366rXsSU7aAF1o2/+QQx980JwZyleoYImwzVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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