Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93ac98b18aca0591a49c0a9539e0be45a57607c8930029894df0dcc4ee5fcb37' 
  AND token = '9tBSg8Aqqvb5YBeGTgbtsfo646R+MWUDVyS1Dm+zOjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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