SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b85a00f152057a9eb3196cfbdff9b71cc071367546b7a26b8cd76344bd48e3c' 
  AND token = 'hvw8w+vSvmZH9zFNFWvBpjcXvvRjgO4OtiMPyVXICpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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