Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82ee4c0336c190d3ec5813b7602bd39a7350080b9cc7e022cb75029a381d840c' 
  AND token = 'cKpG3RkybksRIKq+HWc2/CP3Xi0DCRcNbXfGK8/FPq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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