Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a9971b7f74105f28b196d19a23bb6492488129838ad8fc0a2ae96f6b69e77df' 
  AND token = 'N7QdwB1x9qP1lx2qdXy8ER+7qDa44Lfp04VDkNvYCVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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