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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d11370418a93a65354d5887002f6149f17db0ae48b391bd2a8e64ef0f8b65b8' 
  AND token = '4Ua0gvg9toPkwbXAu5v4mu0jd3B3OVcM7zr9Gr5NlTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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