Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37dd3096f6f9ad3440d3986113fe9c1545d574820722f4f9694a6ce80855d5dc' 
  AND token = 'eDRvwN5yhhrsPKfSmf9LiLNzy8nUx5UfviMZruc48cQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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