Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a8c65dc64023c57a568af9315e5e61fe00f35e44e5e4309b52d9ab46fd0bf71' 
  AND token = 'gHqSDt365xtXlnEjuBcHGm7XKgktHLjvTmwpYGEwj9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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