Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '569d91e2b062057737786f6b27d697d1dd9450cae4bee862eed41cc0248992f9' 
  AND token = 'X8EyNjvuPbT4UbMkwRtQyqRH3se6NpMnSvX7gZoH4I0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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