Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c24b47943cd588b272e5126ae0e9368eb1235b473f4ec1a7e2770f3ef2e5d835' 
  AND token = '9qDalf3rtOGQlhW7uaa4alqgu29X6kLT+5xs7Ek8mhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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