Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cc20ed0a6cc4e08e9d6376c558daa0a256a6a293c1da1bd3cc7423a38d3122e' 
  AND token = 'sCtyGSVhI/r+Jv/uwhUdj1YOkZyIX7nkl8gnNf1EQrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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