Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac1cb2410b872bac5ff413f92293d44caaa29a2d8404913ee99c032028c87fd0' 
  AND token = 'm+ARG1EUyyRP+DU5fu1ZBTd068vkBfZ4NFPG0MtZiX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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