Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3dc8cfbba26387865a43eefa9dce2c246cdb05ffafb0a0e58e2fd20cf944d22f' 
  AND token = 'QHJCrB3dy2amWuZnC9khY8PJNnmyjVEI090uEOTmyIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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