SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05df7f072ec9917219fc9865ac2aaf7da44ac2bf0980b886aa959e5d5bb013b3' 
  AND token = 'dBsWnNp7gCJZdGG4QvN/rrYBp7DRQLeUKg1vqB75DUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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