Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17d028e3076498a0697c51bd8c07968bd7a67526cb2c283296e0d19866244ace' 
  AND token = 'WTmE+PRxXxLG2uSUFwBHIK1nkQ1vfbVR7xCpiLvadK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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