Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22aeee6917a8f47ecfb6a3bbf365ac699dedd86d2ed0ed00b943bbd1b0a3463a' 
  AND token = 'xvCt9DRprgiaqCW1ipxgJTv4a38aTRrMcQMMvNe1fhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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