Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f57d8c0e0aaece7c0ed6084a0c7eb673394458a3795f14e6cefa6dd567143f9f' 
  AND token = 'rqmsvtJbSYpH/vgJ8/AO6QgyOtUkiAm+cE+mpJuDIoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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