Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b7f6005a44fd3ef24d9c45aa25434ede5ab1f17cc56121e441ec2403ffd608e' 
  AND token = 'DQ4CNLdGl3zwfAtHreKMxOnYjudUR6QXAJPipvZppGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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