Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18c9e6c0f578ccf66d430cbf5faab85b361bbd680c9f3fc4ebd86678369868e4' 
  AND token = 'CzX53pnc7vLuYZEnVS+STnZ5Nb5m8qBc9+ev11Z+CcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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