Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6032b7eb5441cd7872686b9678333d8e3d17c6a09db2bb10311240b1ff25f854' 
  AND token = 'iCU+C0LWieL+Wh3QYHvE6tSbL9wIVb8lK3MhZ1y3xoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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