Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc0a57b2ec99114ff79cfa8561b4b3d95e432c78dda058f716bd68431413d8f0' 
  AND token = 'ZIf8EkVEGzRtV9u9cXLyh7UzjtF2XTofike0u2x3Du8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}