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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4b2942c362ddd2aa775e4a6cae7595dbd7d27d02dcc594af26dfbe9c231c960' 
  AND token = 'RyNchmx+CdWc8iYt2V/ohTIqRTXVNuHwsLvvsBHZC60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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