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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1405bfe53e8b778aa44bd9fca16abac945f48a5e2fd14fb10cf5ade9f6d650c7' 
  AND token = 'NzLS1gXAqJpfwIKoqef8/HT1b86p8G7zXEeeY3G/CSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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