Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ba73c036ec3b384d968805fcb4a04bf2b4e416df432689f8acf5b8a862a9fc' 
  AND token = 'nc8u3z7X2ncxfcfv2ccPH2DKxyAwLQqCNeOeyw2QSxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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