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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04a9f01a0fc91f3d173616f6d5d88a9072efd306f439bcce006c53a6cc1f8e2b' 
  AND token = '8dS34A/wmXYAxOYYiCUCwmn8H+Hb2X2IFzvX/4utUIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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