SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24aa95b613275f7bac45bab5907ff1f3633139df10e626eacaf629d25d6aebe9' 
  AND token = 'VZqS0wuVlLDeUre+F+4WsHU8vJIWT5jb0H3u6P8RJMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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