Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d904f620c2170566025850e90a1a2efbe84806dd05d53973efb0f8b3c230410' 
  AND token = 'bNZfbJcO4ABzycgFGfyKET78AMiEPKjHh3bCVlXGzqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}