Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a70a6f327afc28cca249d94132f3daa36679ac4ec5c7d49e11dada09ff81fd3a' 
  AND token = 'QZxVETUtvubEmN3gHLpqR706LsieXx55Vhls57KANss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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