Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '404221b0dc4ebce0c4b371f94e3f5efc0c5d23838b77e6d14a942dc5209c5ae7' 
  AND token = 'SunKerlmyg6KhHw781gZNnGa7HML7LXgvQwF9JGcOps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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