Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5221a87435a657850b1a68e55fa46c67822a742fc15131b3161eca755e4c2f2b' 
  AND token = 'POV4A5oG2FyvBbEZyS0ZutLeQZhuGEalXVFjPGRv0PQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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