Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '623c1fe89d4cb6e6fa9e9d35eb3c181e428ba164958cceacb884bf5ecd383292' 
  AND token = 'bwgB3xGMCaTWzihHnWd+L9tik1gSfQ2YtZPRGNYjOmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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