Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a8b78493e08031f28f8d2462948b36d3f316b24b9b6d99987d8e5430cf94fd9d' 
  AND token = 'Vhg/W+HNNyh3m2DzdxkNBvHK2K7h9+92+86nClyC8gE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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