Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbee6f2534f9f24962cf198d2cc47471c6f3682aabfd2d36b7c7fc50f99e3895' 
  AND token = 'LQ9zJdypIcpRv4aH1yHf0nmijYpM64gzXN+sMvH3gpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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