Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5da272d4eb24206b0f1f588fb5a54366886e37181e97dff262358aa963d945a6' 
  AND token = '4CqNgvjrlFGgavJ31Deupnuxjrt5ojkTtK2ShX4nfLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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