Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2fbe1d719547646e604615ccb6fe69324536fc65bf07ba79c862933db8b4da8' 
  AND token = 'ZGY2awLmAp+ijtMrS4K41LNAnb8ZNd61cnehw4yfgaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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