Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '417df0b888881064e5d2805731dd46e17a30b84298e2054cf16b55790cc451ed' 
  AND token = '/xJ765jHt6cM6jCRuP7WLCX/QLcF2ybtorh9W4Pu95M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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