Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66d454910a8055bb06a97deb6369a8721ab61fa7204da71bde8c41a30e45f10d' 
  AND token = 'ZCgXpPk04gvEpzLfFjDr2EfGwBOtJw9dt9D5ikB73Us=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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