Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd89d4c30d41fed0616ee4122cb863e91b874bd0069d91c38746df02bc024aa41' 
  AND token = 'SfEM/mkdZyLKQGjsmbKhQ0V18rXaFhNqqdOSEOb3/rM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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