Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffafaf70a10b06a0e10b2f0709b39a7aeb6d7dbb7344baf977daa1fb7b87098e' 
  AND token = 'TC17ihj96oht1slexj5tJY4vHbslZ4TqM0UQAPaMCRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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