Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '555f17786cf76d5b3ab01e94a38e1896f64f5cca4adf0451f7891d470b800b79' 
  AND token = 'XiV7XfmmGBi6QEEcOuzDHOs+kt5W/zfhaTx+rFqQlmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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