Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86b5190ae2cbf7c251270022105107f6e072c41755006a0d18a181141eceaba8' 
  AND token = 'nmcP1gQ2zqdz1f1i6nhDhveDQ2cNKWtmgd9zR4Wztpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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