Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62e221704cb559f42c8fe0e1c587be2bcda93b81d03eb7e0dc6fce16424ccfb4' 
  AND token = 'WoF6bXSlHWRjRIi2YR6n0BEOqrJNIpO3p+m6PWcfcQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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