Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a8c10ae06364c3d099857b5e4b1684c95cea4e66c19e68e0f9cf8f6cc0a2815' 
  AND token = 'XFvPtx2BdbykoOr5h9uoNyJuK4I/Y1ke/uC8ES1xEGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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