SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd6d86b94c7b41bf2a5f1a7714341b9f1e893ed285a5942b391cd90832b6b6248' 
  AND token = '85cg9bJ6hAVHQlGP5YBxr8nKDet0XlUyLirz21bgyYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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