Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c0a58b31387b41208076f85eea052a6dd75d6f53898295e3edf4ea9b3a62c5b' 
  AND token = 'rH/OFiZLfI+4InawsULfXD9DpRBT1dG5Vk9iPs3XhGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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