Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f007e4ba0182ed0a18be7feed74d4a6e3dd5be06fc81c340202dd2e0a22d138' 
  AND token = 'XE5T10BEOZai/2vXW/SZWwdfbqT0sbUTkO3rx2/zM0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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