Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8aae72caab7f6acadc2b1067666c646ab643187ac66740de8bbb42c841c81515' 
  AND token = '6RFZAq3yTdK+7cLy3CTihGG8vo8oD3xQo2DGwOkqUT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}