Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34da3f623acc7f6ad2096c082ade69785c2e9907d1d0faac4a8189d203eded12' 
  AND token = 'zBnGWzZ9Vwd/xhiFD9pSeDJlz1jYJE2D3TMD7ahhsng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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