Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '402f106073e47f746056a6e72fee2cb0696548d6f637414f9a6e5244dfa94fc3' 
  AND token = '3fnLjvH3Qg9wMZ/TWSl7wTHGRw59xgmNW/kmz862/E8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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