Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '435b3ec55b3a3782adb030d44e036cdaf1e5d3d6f65149dce46d439480cb7739' 
  AND token = 'hcIGZ1nyYkI4peHS6Ldp1xUcPUpZkHSPg5NZONeC3+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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