Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57e72b067040c64a1f32c9755578721a2712d4a39097476e6d1d621f3efab085' 
  AND token = 'QjaaMRI05fOqB24otKMXLeVi85F7p0lQuRydqtINEjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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