Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64c6d702013a6092c03f9c3f9a803bd1859a4ea4b82382b28ccbbddad8a76339' 
  AND token = 'TQVeu5tpEbKcyJZ6rDhjV2LvvjM2qAjsYvHscF52F0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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