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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1a3ab1865572595a43bb35c391b730ed8dbff7066de73a675c40dbba1d5ca7d' 
  AND token = 'mLrNASKOB2bLk7s2+T8V7tyHeYFpzKJMAmYJa7sfy+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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