Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ecb5c99187e11390e80e000d99ffb6cd89a65779f7cbb41037971899bf6ebab' 
  AND token = 'Q+fOJSipEACexju/EBMEsDeXj5uqBuUA2qpKu8jzSis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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