Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5e319abc018a4394174202af365329a627a50f1ca0a7f8ecf00301fb09f0393' 
  AND token = 'ecpmo86dveXAL6Jh7fN28cOWpcwPbEhfuFlweEMIsRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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