Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e829f399cf041ffb6fb10fd22306cd7aad4cf7277ae93da2da7e26564ed90267' 
  AND token = '6w2KrNb8sYHfoGIxmq93UTH5yPUyYio6ToV47/oHQGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}