Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ed827457ee6e039d81c82b43a3b3a435b9d45ec268ef03b2ebd1580263fb21b' 
  AND token = 'W8RdiTdoZvH9veKTA0rKm1XChbdi7D7gUL9SLWDGHq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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