Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd69871c12cf9c732bf939829f40839d7b006370faa0991971923c67d3b16576d' 
  AND token = '2OBtEGDzzXrl51SolzenmxSojHLqJ5X9WhtI8hn4p78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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