SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86216fa6f5e6075774bea1ef41ff2844f79d6270d49bda6c2caa5b6087e30da3' 
  AND token = 'wnVnXJBzjhllSyYBYuIrBGv/GsE6XysVo6YhxsbmjqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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