Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0e4f8ca065621fa4f986857dc50cc45994919a97154c5b83c42914901d0152f' 
  AND token = 'iYoR9nvThhnYaSMZLy1ncDPuZV8O/jjzda70qBYgxsg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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