Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82489d1281fa3de83e784137705e7434fd6939ea177ca670cf53c0d245ce0d92' 
  AND token = 'qJIAsqxrQGIS9Fc29hN1tVxNseneBBQ8Uv9Jp4H8Sn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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