Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98b15e176e64aa5aafda31c233f9dc5ddf19a55952d330bac46d6fa31248db05' 
  AND token = 'Ktvms6SVBdP+0bcRK8X4jxUOrw9A9TnnNXsHVbUA32E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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