Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6167ab8fa44c1ff0c651045e5e12ca35f868768c564b2ec887b57d3607b7e8a4' 
  AND token = 'Od81KLusgtevVsxHYVVEtoPllH7brnNvYQHjtyYONEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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