SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '864f96c56a7171d5cbfb6a6edeac72466e927533afb0a1971e644babbe8d2740' 
  AND token = 'g5QxVBbhWQOSmUX7t6/D8xa3DFwvQBXp5HKMmXwCVZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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