Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6f500d4dd88c9ac9f44831f1dbc8816f5b60a31c9909bdbd1509c7bf49a708f2' 
  AND token = '2acZsUd7aGrlvTdKBNenHJ7MDDEIsuzscvbWB5Oz660=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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