Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaaa1dec316d39c859e0fe8ddb920bcb6e1e1bf8365f548624dae2b8df4f53d2' 
  AND token = 'AAgJ9fuAMrfWy88mCtPmtNWyxu/+G4dQASn7eYygDn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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