Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb43a9f5cba66a85e06076a849bd90256dd6c0c70318999775545ae44b3e2672' 
  AND token = '+XJusJjrgGCjAr7SBhUEp75TFdXrce8EmLlsutYUqyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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