Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b7d30a9736c0244ad676d9bf68095d178801370f933919d529ae66427f98f2d' 
  AND token = 'sGQBA55z2Id/KNtKHnD5XB4hUJxdAunN0RH9rle2/1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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