Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27a33d6a4c44f315afe23c9e6e50c5dee3d73028c03e96361b03979c0223ce71' 
  AND token = 'KgSEZNQy4M+38rbeSIxelRkCYk+DB6wfMI+AMh3Z084=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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