Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5909227c035393681fefcc38b4b57b30856095f604d48333fafe81d371ea0861' 
  AND token = 'QERep1COd2y1m3M9X5fj9GL/SiGxqP3zp67YvycRuyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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