Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59c07fb6e1d7b1ab6d6540a8674cf47d09db01853df328efab20a48337f7f904' 
  AND token = '/2D1M+UpFZuCQX6gNLl4TTa/dyiRbkayHbXJ9/7BPxQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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