Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64cd1859a7dd9f6b265bbecf3c5949c7c7c1301e48e9a4ed82905723706fade5' 
  AND token = 'NTN9Uq58QmZET5eymyvc8BKv0U4UCHlSD8AT6zli7AQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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