Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16543d3a708ba2b8556314aa4f5ad12489e6a7bc43d342dcfc7d034f8c63cc22' 
  AND token = 'OFm6Fbw5j12v0ErqwE8tehTkjrh1vClW/vdu57z+/eY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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