Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffc5d2b348a7da8d98b16845c02225109868d3c0536353382e1100b1a642b33f' 
  AND token = 'leUqkbc0T/+qXoToHGpgQRenWm3pcVx9E7O6HqGfmmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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