Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '405113073884ec32a14ffd0c3d494ea57112b9684bccfec339b985fd87c5c6d4' 
  AND token = '6aK1atVLe52GGkEhE4XFl4o/wOn+wFk8ju9UZ6tm3Ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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