Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '012edab9c20756e4db1694e0c1201456789a8365e6fa4dbaf1a01c396cc1d33a' 
  AND token = 'Ids4tYgYpOzn+j+8/z60p/FEPyKnpjbrYLR7z32Xdbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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