Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c85a2826bacbea111f2435d309337156a4349f677ecaa4fe876e5a00f1d771b' 
  AND token = 'ozkSL/403FEYfqmxRgIH8IwtBgkYtMKkvEm2ME43E2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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