Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4c4b27e5082930d71e7863e03ee9826601fdacbc70e5389bc45ea918431d232' 
  AND token = 'W2xZJ9VgpShjjVLMii4NaRKFkiEaFczcs4lsADuY7kw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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