Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f413558578860e8f55531a638cf94ec63613336e0c8e0f9913ae97fec4ae683' 
  AND token = 'WSm/ViHPKmstA2nVFWezCn91IjsxgeLyELf5FLwOYoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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