Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6f278e99dce7b6aff65f2cc52005ac9e4ba44ef2aaa6021a4ed31f9efbf2df1' 
  AND token = 'W/VMZuZogRKZJsNkbHOsR5hsZMIA6cSpu7H/5f7sUkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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