Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac92d55128784914a4db6700c35cf924ac485932f2eeff857689ee5e24bb0dbd' 
  AND token = 'gRzjIjmqt9/kVqRTddjJNIcCAHNYJTAq48inT53XT4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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