Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8614de169bf541e3d17cd40523fd5517d88a4e1f71625be4cd84108b66d3135e' 
  AND token = 'IrOT931lWd/gdBtPy6ftr2jWJNDgnHLwTMOUbspe8vI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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