Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22a23a7e5d67de92863769032f1b0523a04b7959066e5186c3fe1da06d2e0f92' 
  AND token = 'm9ForydCkS8IINklzoVlAI464xJIYdCziumOk0jw2ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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