Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '958c93703a1d4580bce52b653c174f7f6ae7e3523f880a8cfda0f0565f24d558' 
  AND token = 'ZrFUOnTFPKexRVRzbNO2yP9Ejo0wvgsT2eDyl/ZoxFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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