Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e76fde8d6ab5bfb9c29b2752c7a509379d147bded52b164cef75615845b6d74' 
  AND token = 'mUDaj3ToqHt/7R+DGI4I0/m0Y2qI5TZIQ65IHYfyofs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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