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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01090e500e94b768f7b235e0fe6a567a0026c3b81c2d12744f619a111dbcc27d' 
  AND token = 'u8c7jWnA84tvIVz8y0G5lqswhqhwrJxHU7aRV4R89nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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