Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c9acc948a88931486b9ec5f534ab66e6d2241b358386ea963c25c2ea2dad145' 
  AND token = '9hF7xm3oEy+VxLOVS3CjGeE96QT5EeP5qh3loEmrZYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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