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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99079b802f2f1dc719b977c62b324503ed5c630bad97db9fe3bfe152dcfdd216' 
  AND token = '2GNYyAB4t0iPvZM9WOQTKuWGd0cYMntZoUwKNbDJi0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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