Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1425c221b040987eda59e5b96daaccba321c7138a54331c66261fe01b4cbb51a' 
  AND token = 'UGoz06mPcNZYH5+s3nlu9NQUnNZ/hs9iB+qyHmdxxL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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