Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac6bcc7ec43042f88578bb34ffac3e75f0cf7f99730cc8b5bb35f35803ab5813' 
  AND token = '1o/3KQfQwxgHY8gWxIUVKPTtls09pnkc5lrsKxrwu3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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