Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c648e2c43d783f59b1e91941d509a6b11df5a97628637f9545af774f216aa6cc' 
  AND token = 'NwRreFlyy3fg9cEAX89N2R3m2VrMif/adIrDjx8fbSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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