Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e21340d6e8d6d37fa96348c46b8a97b13221d65f2bb7a27fa349fa33600616a' 
  AND token = '5UTV7uHwLamTqilMzaTr9+ra82T9A6vOYPCiDrexlHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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