Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '991ad0b26ef2dbf03c24c5a7db1db0bb171165a70dc36ec328eb75f6738a81cb' 
  AND token = 'DFj/mMOPNKSnx+Ci8cmn+DgyiNi2XWxOJSrd4THIZ+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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