Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f93e4286805d04de89f49dd0cd29e1cb65cb6cebded27b4699a8604c5ad69f4' 
  AND token = 'sFxI6OH2egvwXB5e/7OaRoofvr13tAzZsuTcli/RbeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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