Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29818e9d8cb5ac54ce5fa41751e87ebf91facce773572c093ee58fa772a2d452' 
  AND token = 'hsZ55X58Wx3l9NV50MF0gIyNI7Ir1eshBhcgskzZK0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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