Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1cc09f3cccad635507fbbb5ef1af6506b9c1ee6a92d0eb18e379cf5f9ef8452' 
  AND token = '8jtQRRw2LuTmSRDWw30jPKxLOe1rkTQd2hoveqgexWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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