Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b05424a7fabb572e87fc991ff513af5a2edbc518a69ed3c3f89b08dd3aeb6ac' 
  AND token = 'DVPpjHtfKVk2PNGqa7Q6GmGn3v9w6fpjxEvQ2SZf4mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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