Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f6400d67709e2655caba041c645bdbdde11c4914e3f3d3e6b6e74ace36bbdfc' 
  AND token = '1EzT/tYH9bISP6xiPtfBD7LNlvS3VoHLWyIFPT+J4dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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