Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10d8fd37b7997f42c27e03eca76309e6a275b46428f2bebb9a5dbe6c707acfd7' 
  AND token = 'o7Cb8NakhIUBSUNWGm5rN1F4zEgXJMR/QMiNir3uHVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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