Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '733e83b38f0aa55129d3a26b4fef0ddba84cd410bd4ad8f853381ce7f4e99df8' 
  AND token = '2COTZBv8laoh/CBZ7Ikbvu4+WtfltfNkaKZ7mIzWiXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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