SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5f209e7d2a29a3d3a79cd7935d2837cd0f75069f290fd2214196686838ff7406' 
  AND token = '9o9XzZJisBBK7T8HDUMu/LGjyZro3/24L5piqRcDSXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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