Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ccae054287fd7054a51fa4a9c47ee012336e74baa687965fca7d985da1435d2' 
  AND token = 'yXp3TLwCUCU6cHVMUXWCLgfVR7e7XTMgoMFAp6tTbrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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