Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dac6fb282a71c3893b08a9a6d26e55826c728267db9c237c336217d05d4ac1ee' 
  AND token = 'gyE/ZIFcEuvF4Ax+mw+EPr3GyRnU234751GcGWDkcTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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