Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c231a29a64c40331fcd8ed7679b50e59d01da20c30e34ec20f096a34eb5af0fc' 
  AND token = 'RLZytyQOOALEs2bKAoQ+5oWaO8rpaRXdXE+U8ThFmSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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