Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb56b410d9f46f72c2344216838231dc0c45eadf1ca66384acc7cc426503e01c' 
  AND token = 'Cky/g6D4BO+YmvVU+lLVTnEtgI3556w++5cBZZpVDYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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