Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0acffe43ce1326e247cc928070c53d537958be5e7551420cef0be17731849fc0' 
  AND token = 'v6+dkGLd/86pnwR26VRQCHgFuI6Uaprnv5TM3MLlNE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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