Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74b92524fc82fc29cb66d8bd49cc1ac6d8617b8e99d8978cba3a65080eeba9a3' 
  AND token = '9MpOIXsriLg16eu16ayTBSyL8piZreQexGPxEpMAIMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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