Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2897e902b481b49b71dbb2efd3bab0a0ac8aa72d54ccf78f4c6f9bd2e0899ce1' 
  AND token = 'yWSphZj0SkTK8m297XQZbKZ2z7sEhrySHrjD67PT9dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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