Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97a1681d6c28d1c81b74e72784b3f8d0868502e0bd4b51417fdf2243ee487de0' 
  AND token = 'JM4PekJDJxvdDpd5Y8K7SYy1ij0j7kepdUg+/cA+sWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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