Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e60aa1c3f881098f143506f3ff775b2ee10632b84d21b671c1037be0d6c9ef0' 
  AND token = 'D/Xbh5hwffvMcNVruQkpP5qUvnYBCf/OF87mD2mmqAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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