Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30347bb4ab5e148540934bc07b0aebf5f9576b436f6ff23dc8a6a8b3f1a5b40c' 
  AND token = 's2g8F99uB82O9lgPoZonx4Meazh8v9bmm/GnYq7BMxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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