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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cf6de63a9e8b3576f020b6cd530dd4bede677cda9041b58e13e447fd23c4ff8' 
  AND token = 'bLpdHeVWojBdEGQBdIh/dAO1YP6xA67dr6r4cakTZgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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