Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4aa25eaf9f963eb28918626b082cfbcaee28a59222a84f3d86c74461c500e1e' 
  AND token = 'fgJW0ovkccaFP+281sWNtxGzQ0jfDNv8ERmdXyAqKhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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