Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f13d441c6986089e7eab16e1168cbae6cf40b62f2cc7d42a038be6acaddf86bf' 
  AND token = 'KI8EuUAOxLs6WtKeJvtgJ28xySy6Ci3JTk2dOGdTmcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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