Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6ad52f0ac07a32f0015c573e962a45d380a4b09cf89e013754a7af2c027bcab' 
  AND token = '0wfQUl+vuUSCHuObVWRAW98x59xsqHAigT9y+boBNA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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