Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ba6a0055e125dae764e3a5f3788702fa6f9b017e69eb78008d5194b601268eb' 
  AND token = 'V5JXvFHUPymVFcSRPvVHRftM8aQ2luTTxLQklaIy8AM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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