SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f89c749a206dd5ca268d16356f2d49423213fd252d915e00ae77227783dbb0db' 
  AND token = 'zcv9/UO8wItK6B3RBB0VbuvzzVd2NTUZFsmjPDpXFz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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