Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bf842c5604ad1d48e8b6070549c8d14cbe51583ad6c17ad067f1fde029e6ed8' 
  AND token = '1IwL6JCJoB09pm8PRlmpexZ7Cz1c7QFQbE05C/lVG1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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