Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e59df6dc6cb03638941fea358f99026c5d352829c6869f55bd59dceb96237b4c' 
  AND token = '+qmWbdcWG4UHiSybv2JDIHUn3l/d9J6r2Tv4X0TRfj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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