Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59903800a42eb0f700f332cf9ceca987b4e2147891712a9f486ba414e2632b07' 
  AND token = 'nFN7KL1aFCPVffN4oUE+5nb/LHFoiZ5iOt2H1g9Z3QU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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