Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '581dc4933b595b8bb30e9f64ec59eca779a7c182f301c61e98d4b7e05a83d293' 
  AND token = 'HEUgcYWRAdRKV8YePkmxdcperpMo4fvqWHMSW/GcwhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}