Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a6c097e7dc1cc22e0db35c80f33a264a90198fdf80b7e4c7222d9b1e68809e8' 
  AND token = 'zlWvM8hYSeEnK/FHHJdskw7yD5Rr100Xq6KxaE77zLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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