Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75d0545d881e1dde19abfa3fd3a5d0aab57f5a2ac670b37bf3ab0c9c89de4a82' 
  AND token = 'utE31KSLBl5Hqt8WCaWPhD11SnhB/95njy/eIDQ+9lI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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