Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2abb36bc3025bff800ca7ba8845d64f951e20a0ea80bfe0e969a30f9c6cf1711' 
  AND token = 'Dh2Tubxk/wZtuxmdfdzKGGFZnwA+WPPnbaWtOZmh25g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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