Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c3ce49937aa1ec89d80054e750663e03e48bc925b189002f7e5d8d7d7572e1f' 
  AND token = 'j9naTzXzrSBV0UWcYHvjFDqpuRjYt13M3ReyeBpWUSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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