Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d4b992c9c0a3e0226f4c52a1c76b5575222df62f7ae2a784c988fafd6427ea5' 
  AND token = 'uojxUAlr+JXJbJ9Sj8csy6jo96WT4ptVelqApvyiQgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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