Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ff1ceca6a8c93f0b5bb67674d80744d47c68a89ba06a6161ec09e4fdcb66eb9' 
  AND token = '7EUKcT51wwUddCEY9V3QrrK8mCwsWww9o9D9bnZ+1As=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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