Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3728838137c2c2327ecaf97a5642fd59c938677b4ad9eb5bbfaf55e1253822ee' 
  AND token = 'crY9yXITXRc40TbOuA9QbZT2IyH3AKUsuunloFWrXqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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