Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b6380da838a1a3b2d75f137def662db632fc758c7efd1705940dea22182c23f' 
  AND token = 'E97j5wu6r/Gf3kHebUBbsglC/D8OHpRKbOOLidIYSi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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