Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c35c7ef7ac2c22d84ccb60e182b2269466f402eb427cf6b24ac15b2e07fc1b35' 
  AND token = '/OfGmfnHj1viD63a8Z1wI9emtiXHBeIl8Vnj9vtjF3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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