Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66c637ba6b7a21e5b661836b6425825ad76d15b8ceca64e98301c5ff329416c1' 
  AND token = 'L5AkoaO/0NWq75Ikp8jBDzJ3BDaHb7YIA5t9Xd2G3Cw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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