Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c206d64e8d089ef8763b7ddd5d9e954cf2810f6a8b9fe760608859da1e5799fd' 
  AND token = 'k2vqI5B7jGTKPQomnYn4OmaTygIotJFSl/ykqwK4dk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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