Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c94cc3cc337ff9425c4a83d7e43c0b537fd03bb70b489fc3b63ca9235ca733a' 
  AND token = 'YvPy9ACQoKsYyW7S+19gUF72ieyycJvPqKy1yx/Otys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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