Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2b12111681f2d8efc6c9798547fd9fe812dbd491877bab1f04f506d106d7bed' 
  AND token = '2orabM54KRBQWWJ/iak1peN15cQ2TP1PCI7N/oSlcCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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