Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b9ff7b61d4fc0675a37f95807f93f6ae34c9caffa55a05b0d13444b0df70a7a' 
  AND token = 'sjMCb3CC8d3oToyzhDipmgwgHViUo2GPdTcu9Uf+VrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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