Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16aac9f974adf168c4380ac18960c5ca7f60d50af73d61dc8f221cf7f9e5e94b' 
  AND token = 'QAyOQTpE6SPLcQ6n+98Q1CDAl/N1XwWlJtwMMqF6KF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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