Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94ef3c66b7fe8ea0c117752a2689b2ed950d7d6f7fc3e81761d9155f58f854c0' 
  AND token = 'pzXJPAi3Sm3xDQTKa0j1DBjLXJmBVawLMOkzVPXNXyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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