Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd17de5be79cb5fb08635e18c24ff6ace269361830e6250de987d51e9ba17ade4' 
  AND token = 'PpVOGX61DPVMsWkjWeN7UQMGyFtbLl4icGCdkD84AR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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