Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f2bb71c7113bb0d60a61a47f08cb429f5610d1f4cdc57fa99e94175e164c1162' 
  AND token = 'yvlzvClV/KWTk0ZZR+9W8nlVFfeQMCrDUQx5AjvnVc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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