Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00f520ec9e6752fbfb4597bcb33e9536b8810596449377f1d8758fc19335f719' 
  AND token = 'oSWd/tuSMqf9vipHrKGxZSipEaGhGblAQaRR3SgopHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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