Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ab84fb4ead9757f2a284c1152846f9c98de070bee1edbb488508fb5b94969cd' 
  AND token = 'GsFNPACekdxAixw69UiqKRkfvgVDOnnVI/J+MnIwt8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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