Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7d1bb18cab286d9a9e20a3c5322b82989a8c57a0f0aa9d7e87aac29ad8d45474' 
  AND token = 'AjnVWtohMAWfyrbhB7xQEg/7PF6ySK4m8LartL2e/1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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