Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '39a79794a29a374ea07af980371072b257dfb72a9bec09caf3c4abaa33672a0f' 
  AND token = 'Lt2uA4PYfyUdWjRklbzOQ9q1eU5alI44xZ16sQhmO2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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