Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19cd7436e2af357a6b229ab05035d76d3034988e335b7f5a9d885bcf67e205b3' 
  AND token = '4JNqWtmQM7bRbPUKCqNyfh8aKuPe9Gs3TJN0EdJ2awk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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