SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3662b4a37d7e079d05746931511a898c1f9ae7ac9bd18f5d8d3c995a4ad52e0f' 
  AND token = 'ycwkOfBYZuJKmMnQVILve0MNmKe4A3++xXAx9/uOnfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00076

JSON explain

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