Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '796afbe03a76c2b4d6c0802eba1fadad2d215d595b4bb34367f2aef87f947dd8' 
  AND token = 'MeHQj4QgefeQivjw86bU5s1L6h6nMzfpQT3kBmQROQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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