Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02c4feb58543eed75f7d6118da7eec25b9d031298f34f798b94ffd80fc800ce8' 
  AND token = 'HKrm23V16YGfQhm5RMWUCNjs894memtAxTZhLcnsTa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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