SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d1483195f2919895e26ad6294dbfbfa3492367b8eae0ce49b1697b614ca0c66' 
  AND token = 'KvI26VgMhSEqD2Mo0KqnqMIRtCz/Qu+35FZS95KOWqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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