Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b9373031568f007d2ccba63a92b41ed7f55470d590f566104e4a31d14472dde' 
  AND token = '9WadNjJ84tauh00rjBGLrzMLRVMwA9TwmxOziU4/VUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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