Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb1bc4c0fd1c1561a37c3c260f305e4ef65c8347ff55da5ad577fd27ede43255' 
  AND token = 'JKRrP8LqwQRAPD+wHtFooWYOO8iYaTaNJbhE1tBloEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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