Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c9237e51a1406d90c6bea7033fec0bf6ce0d179b55e40be5ad0074ebc56b870' 
  AND token = 'YRoWwHjzq4LNyNzpiAbAK+lFa8S6JRfAI31+MZJdg70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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