Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c3b94c271bd577f015d6dfe8100f2ec18528adc91870655521b3abe663c8ac86' 
  AND token = 'QAoxjI9KBddA0BOrqf4/6DGeAiTI5QqN1aGboGWJ+J8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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