Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d10c84e5e4cb3708f0b2df65638afff6b4c15f3f9b89f8fba00abfbda519de4' 
  AND token = 'Q/JIKV0tCJZV9PKLu6Ex4mdwDH1c2yqmXsqbYw5Vw/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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