Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdcf25fcb49d65b9b743dbca62fa4846f52d4a87df1cac5046cdc9323409af0d' 
  AND token = 'x6L/qWmBHJ+ia8NslKLND2ivDnmLqvt4M4MfraHuluQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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