Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82161eba7d3b8cd33751c7182af655db1364c2929adddafb88b65c8c5880dead' 
  AND token = '+umtuYLedkYu7EkgZTpiqojIMooHRJwiuXcfYy/ddtY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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