Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72c74992f20633be037b7456ac1ba7dc174e3f3a6e7c2b2684f23c41f866d2bf' 
  AND token = 'aDVvIPvMbbQP+wRsdcrnW33ER5nuq4Gbk1QRmO3J8kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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